Photoelectric Experiment: Intensity, Stopping Potential & Graphs

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)the photoelectric current increases.
• (b)the kinetic energy of emitted photoelectrons increases.
• (c)photoelectric current decreases.
• (d)kinetic energy of emitted photoelectrons decreases.

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)P
• (b)Q
• (c)R
• (d)S

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · What stopping potential depends on

• (a)will increase
• (b)will decrease
• (c)will remain constant
• (d)will either increase or decrease

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · What stopping potential depends on

• (a)decreases
• (b)remains the same
• (c)increases
• (d)becomes zero

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)$OA$ in eV
• (b)$OB$ in volt
• (c)multiplication of $(OB)$ and $(e)$ in joules
• (d)The slope of the line AB

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)depends on the intensity of incident radiation.
• (b)depends on the nature of the metal used.
• (c)is the same for all metals and independent of the intensity of radiation.
• (d)depends on both the intensity of incident radiation and the nature of metal used.

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)A
• (b)B
• (c)C
• (d)D

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)$X_1$
• (b)$X_2$
• (c)$X_3$
• (d)All the metals will give out photo electrons with same kinetic energies.

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)be zero
• (b)be halved
• (c)be increased
• (d)be decreased

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Photocurrent numericals & source distance

• (a)
• (b)
• (c)
• (d)

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)Photoelectric effect can be explained using wave theory of light.
• (b)The maximum kinetic energy of a photoelectron depends on the intensity of incident light.
• (c)The stopping potential depends only on the work function of the metal.
• (d)The saturation current increases as the intensity of incident light increases.

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)remains constant
• (b)is halved
• (c)is doubled
• (d)becomes four times

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)Both $\mathbf{A}$ and $\mathbf{R}$ are true and $\mathbf{R}$ is the correct explanation of $\mathbf{A}$
• (b)$\mathbf{A}$ is false but $\mathbf{R}$ is true
• (c)Both $\mathbf{A}$ and $\mathbf{R}$ are true but $\mathbf{R}$ is NOT the correct explanation of $\mathbf{A}$
• (d)$\mathbf{A}$ is true but $\mathbf{R}$ is false

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)Both (A) and (R) are true and (R) is the correct explanation of (A).
• (b)Both (A) and (R) are true but (R) is not the correct explanation of (A).
• (c)(A) is false but (R) is true
• (d)(A) is true but (R) is false

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · What stopping potential depends on

• (a)is $\left(\frac{1}{e}\right)$ times the maximum kinetic energy of the emitted photoelectrons
• (b)increases with increase in the intensity of the incident light
• (c)decreases with increase in the intensity of the incident light
• (d)increases with increase in the wavelength of the incident light

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)(A), (C) and (E) only
• (b)(C) and (D) only
• (c)(A), (B) and (C) only
• (d)(D) and (E) only

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)increase.
• (b)decrease.
• (c)be $\left(\frac{1}{3}\right)$rd
• (d)be zero.

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

Which of the following options represent the variation of photoelectric current with property of light shown on the x-axis?

• (a)A and D
• (b)B and D
• (c)A only
• (d)A and C

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · What stopping potential depends on

• (a)be doubled.
• (b)be halved.
• (c)become more than double.
• (d)become less than double.

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: photocurrent vs anode potential

• (a)$\mathrm{f_b} > \mathrm{f_a}, \mathrm{f_b} = \mathrm{f_c}, \mathrm{I_c} = \mathrm{I_d}$
• (b)$\mathrm{f_b} = \mathrm{f_a}, \mathrm{f_b} > \mathrm{f_c}, \mathrm{I_c} > \mathrm{I_d}$
• (c)$\mathrm{f_b} < \mathrm{f_a}, \mathrm{f_b} < \mathrm{f_c}, \mathrm{I_c} < \mathrm{I_d}$
• (d)$\mathrm{f_b} < \mathrm{f_a}, \mathrm{f_b} > \mathrm{f_c}, \mathrm{I_c} = \mathrm{I_d}$

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)$\frac{e(V_2 - V_1)}{v_1 v_2}$
• (b)$\frac{eV_1V_2}{(v_2 - v_1)}$
• (c)$\frac{e(V_2 - V_1)}{(v_2 - v_1)}$
• (d)$\frac{e(V_1V_2)}{v_1 v_2}$

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)$1 : 1$
• (b)$1 : 2$
• (c)$1 : 4$
• (d)$4 : 1$

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)decreases with increase in frequency of incident photon.
• (b)increases with increase in frequency of incident photon.
• (c)does not depend on the frequency of photon but depends only on the intensity of incident light.
• (d)depends both on intensity and frequency of incident radiation.

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)threshold frequency $(v_0)$
• (b)intensity of light (I)
• (c)frequency of light (v)
• (d)work function $(\phi_0)$

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · What stopping potential depends on

• (a)increase.
• (b)decrease.
• (c)remain constant.
• (d)either increase or decrease.

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · What stopping potential depends on

• (a)increases
• (b)decreases
• (c)remains constant
• (d)suddenly becomes zero

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · What stopping potential depends on

• (a)It depends upon frequency of the incident light.
• (b)It is $1/\mathrm{e}$ times the maximum kinetic energy of electrons emitted.
• (c)It increases with increase in intensity of the incident light.
• (d)It depends on the nature of emitter material.

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: photocurrent vs anode potential

• (a)$\mathrm{f_a} > \mathrm{f_b} > \mathrm{f_c} > \mathrm{f_d}$
• (b)$\mathrm{f_a} < \mathrm{f_b} < \mathrm{f_c} < \mathrm{f_d}$
• (c)$\mathrm{f_a} > \mathrm{f_b} < \mathrm{f_c} = \mathrm{f_d}$
• (d)$\mathrm{f_a} = \mathrm{f_b} > \mathrm{f_c} > \mathrm{f_d}$

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: photocurrent vs anode potential

• (a)
• (b)
• (c)
• (d)

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)greater than that of B.
• (b)smaller than that of B.
• (c)same as that of B.
• (d)that no comparison can be made from the graphs.

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)the work function of the metal.
• (b)the Planck's constant.
• (c)the maximum kinetic energy of the ejected electrons.
• (d)the threshold frequency for photoejection from the metal.

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)1
• (b)2
• (c)3
• (d)4

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)$\phi_x = \phi_y$
• (b)$\phi_x < \phi_y$
• (c)$\phi_x > \phi_y$
• (d)$\phi_x = \phi_y = 0$

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)Statement I is correct and Statement II is incorrect
• (b)Statement I is incorrect but Statement II is correct
• (c)Both Statement I and Statement II are correct
• (d)Both Statement I and Statement II are incorrect

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)Planck's constant
• (b)Work function of the metal
• (c)Charge of electron
• (d)Ratio of Planck's constant to electric charge

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)doubled
• (b)halved
• (c)Zero
• (d)quadrupled

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: photocurrent vs anode potential

• (a)$\mathrm{f_a} = \mathrm{f_b} > \mathrm{f_c} > \mathrm{f_d}$ and $\mathrm{I_a} = \mathrm{I_b} > \mathrm{I_c} > \mathrm{I_d}$
• (b)$\mathrm{f_a} < \mathrm{f_b} > \mathrm{f_c} = \mathrm{f_d}$ and $\mathrm{I_a} = \mathrm{I_b} > \mathrm{I_c} > \mathrm{I_d}$
• (c)$\mathrm{f_a} = \mathrm{f_b} = \mathrm{f_c} = \mathrm{f_d}$ and $\mathrm{I_a} < \mathrm{I_b} < \mathrm{I_c} < \mathrm{I_d}$
• (d)$\mathrm{f_a} > \mathrm{f_b} > \mathrm{f_c} > \mathrm{f_d}$ and $\mathrm{I_a} = \mathrm{I_b} = \mathrm{I_c} = \mathrm{I_d}$

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)inversely with the intensity of incident radiation and is independent of its frequency.
• (b)inversely with the frequency of incident radiation and is independent of its intensity.
• (c)linearly with the frequency of incident radiation and depends on its intensity
• (d)linearly with the frequency of incident radiation and is independent of its intensity.

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)work function of material
• (b)intensity of incident radiation
• (c)frequency of incident radiation
• (d)wavelength of incident radiation

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)A and E only
• (b)A and B only
• (c)B and C only
• (d)A and C only

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)A, B, D only
• (b)A, C, D only
• (c)B, C only
• (d)B only

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · What stopping potential depends on

• (a)Both Statement I and Statement II are incorrect
• (b)Statement I is correct but Statement II is incorrect
• (c)Both Statement I and Statement II are correct
• (d)Statement I is incorrect but Statement II is correct

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)1.5
• (b)1.24
• (c)1
• (d)2

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)quadrupled
• (b)double
• (c)half
• (d)zero

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)Both Statement I and Statement II are true
• (b)Statement I is true but statement II is false
• (c)Statement I is false but statement II is true
• (d)Both Statement I and Statement II are false

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)1.36 eV
• (b)18.6 eV
• (c)2.98 eV
• (d)2.07 eV

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)(A) and (B) only
• (b)(A) and (E) only
• (c)(C) and (E) only
• (d)(D) and (E) only

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)photoelectric current decreases
• (b)kinetic energy of emitted photoelectrons decreases
• (c)photoelectric current increases
• (d)kinetic energy of emitted photoelectrons increases

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)does not depend on the frequency of photon but depends on intensity of incident light.
• (b)decreases with Increase in frequency of incident photon.
• (c)increases with increase in frequency of incident photon.
• (d)depends with on intensity of incident radiation and its frequency.

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)increases the number of photons incident and also increases the K.E. of the ejected electrons
• (b)increases the frequency of photons incident and increases the K.E. of the ejected electrons
• (c)increases the frequency of photons incident and the K.E. of the ejected electrons remains unchanged
• (d)increases the number of photons incident and the K.E. of the ejected electrons remains unchanged

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · What stopping potential depends on

• (a)first increases and then decreases
• (b)decreases
• (c)increases
• (d)remains unchanged

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · What stopping potential depends on

• (a)Phase
• (b)Frequency
• (c)Amplitude
• (d)Intensity

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)increase
• (b)decrease
• (c)be zero
• (d)be halved

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)$\mathrm{A} + \mathrm{B}$
• (b)$\frac{B}{A}$
• (c)$\mathrm{A} \times \mathrm{B}$
• (d)$\frac{\mathrm{A}}{\mathrm{B}}$

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)$\phi_P > \phi_Q$
• (b)$\phi_P < \phi_Q$
• (c)$\phi_P = \phi_Q$
• (d)$\nu_0' < \nu_0$

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)maximum KE threshold frequency
• (b)Planck's constant, threshold frequency
• (c)Planck's constant, work function
• (d)work function, maximum KE

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)four times
• (b)one-fourth
• (c)zero
• (d)doubled

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)Slope of the straight line get more steep
• (b)Graph does not change
• (c)Straight line shifts to left
• (d)Straight line shifts to right

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)2.10 eV
• (b)2.27 eV
• (c)2.59 eV
• (d)1.93 eV

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Photocurrent numericals & source distance

Numerical answer type. Work it out, then open the answer.

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)twice the original value
• (b)four times the original value
• (c)one fourth of the original value
• (d)unchanged

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · What stopping potential depends on

• (a)directly proportional to intensity of incident light
• (b)directly proportional to frequency of incident light
• (c)inversely proportional to frequency of incident light
• (d)Inversely proportional to intensity of incident light

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)1.95 eV
• (b)2.12 eV
• (c)1.82 eV
• (d)1.66 eV

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Photocurrent numericals & source distance

• (a)1014 and 10 eV
• (b)1012 and 5 eV
• (c)1011 and 5 eV
• (d)1010 and 5 eV

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Photocurrent numericals & source distance

• (a)6 $\times$ 1011
• (b)9 $\times$ 1011
• (c)11 $\times$ 1011
• (d)15 $\times$ 1011

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · What stopping potential depends on

• (a)V0/2
• (b)V0
• (c)4V0
• (d)2V0

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: photocurrent vs anode potential

• (a)
• (b)
• (c)
• (d)

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)Work function of metal B is greater than that of metal A
• (b)For light of certain wavelength falling on both metal, maximum kinetic energy of electrons emitted from A will be greater than those emitted from B.
• (c)Work function of metal A is greater than that of metal B
• (d)Students data is not correct

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · What stopping potential depends on

• (a)Statement - $1$ is true, Statement - $2$ is true, Statement - $2$ is the correct explanation of Statement - $1$.
• (b)Statement - $1$ is true, Statement - $2$ is true, Statement - $2$ is not the correct explanation of Statement - $1$.
• (c)Statement - $1$ is false, Statement - $2$ is true.
• (d)Statement - $1$ is true, Statement - $2$ is false.

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)N and 2T
• (b)2N and T
• (c)2N and 2T
• (d)N and T

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · What stopping potential depends on

• (a)Statement - $1$ is true, Statement - $2$ is true; Statement - $2$ is the correct explanation of Statement - $1$
• (b)Statement - $1$ is true, Statement - $2$ is true; Statement - $2$ is not the correct explanation of Statement - $1$
• (c)Statement - $1$ is false, Statement - $2$ is true
• (d)Statement - $1$ is true, Statement - $2$ is false

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)threshold frequency $(v_0)$
• (b)intensity of light
• (c)frequency of light $(v_0)$
• (d)$v - v_0$

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: photocurrent vs anode potential

• (a)Curves (a) and (b) represent incident radiations of same frequency but of different intensities.
• (b)Curves (b) and (c) represent incident radiations of different frquencies and different intensities.
• (c)Curves (b) and (C) represent incident radiations of same frequency having same intensity.
• (d)Curves (a) and (b) represent incident radiations of different frequencies and different intensities

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · What stopping potential depends on

• (a)8
• (b)16
• (c)2
• (d)4

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)change in the frequency of light into a change in the electric current
• (b)change in the frequency of light into a change in electric voltage
• (c)change in the intensity of illumination into a change in photoelectric current
• (d)change in the intensity of illumination into a change in the work function of the photocathode.

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)$10^{-4}\ s$
• (b)$10^{-10}\ s$
• (c)$10^{-16}\ s$
• (d)$10^{-1}\ s$

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: photocurrent vs anode potential

• (a)
• (b)
• (c)
• (d)

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Photocurrent numericals & source distance

• (a)increases by a factor of $4$
• (b)decreases by a factor of $4$
• (c)increases by a factor of $2$
• (d)decreases by a factor of $2$

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)
• (b)
• (c)
• (d)

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)depends both on the intensity of the radiation and the metal used
• (b)depends on the intensity of the radiation
• (c)depends on the nature of the metal used
• (d)is the same for all metals and independent of the intensity of the radiation

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Photocurrent numericals & source distance

• (a)each emitted electron carries one quarter of the initial energy
• (b)number of electrons emitted is half the initial number
• (c)each emitted electron carries half the initial energy
• (d)number of electrons emitted is a quarter of the initial number

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Photocurrent numericals & source distance

• (a)remain same
• (b)four times
• (c)two times
• (d)one-fourth

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)photo-current increases
• (b)photo-current decreases
• (c)kinetic energy of emitted photoelectrons increases
• (d)kinetic energy of emitted photoelectrons decreases

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)The photocurrent increases with intensity of light
• (b)The stopping potential increases with increase of incident light
• (c)The current in photocell increases with increasing frequency
• (d)The photocurrent is proportional to the applied voltage.

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Graphs: stopping potential & KE vs frequency

• (a)
• (b)
• (c)
• (d)

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)in intensity of light
• (b)in wavelength of light
• (c)in frequency of light
• (d)never

Photoelectric Experiment: Intensity, Stopping Potential & Graphs · Effect of intensity & frequency

• (a)$I_1 = I_2$
• (b)$I_1 < I_2$
• (c)$I_1 > I_2$
• (d)$I_1 < I_2 < 2I_1$