NEET 2016 Physics Paper: Phase 1

An inductor 20 mH, a capacitor 50 $\mu F$ and a resistor 40 $\Omega$ are connected in series across a source of emf V = 10 sin 340t. The power loss in A.C. circuit is

A small signal voltage V(t) = V0 sin$\omega$t is applied across an ideal capacitor C

When an $\alpha$-particle of mass m moving with velocity v bombards on a heavy nucleus of charge Ze, its distance of closest approach from the nucleus depends on m as

Given the value of Rydberg constant is 107 m${}^{-1}$, the wave number of the last line of the Balmer series in hydrogen spectrum will be

A capacitor of 2 $\mu$F is charged as shown in the diagram. When the switch S is turned to position 2, the percentage of its stored energy dissipated is

The charge flowing through a resistance R varies with time t as Q = at $-$ bt2, where $a$ and $b$ are positive constants. The total heat produced in R is

A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of emf's is

An electron of mass m and a photon have same energy E. The ratio of de-Broglie wavelengths associated with them is

When a metallic surface is illuminated with radiation of wavelength $\lambda$, the stopping potential is V. If the same surface is illuminated with radiation of wavelength 2 $\lambda$, the stopping potential is $\frac{V}{4}$. The threshold wavelength for the metallic surface is

A long solenoid has 1000 turns. When a current of 4 A flows through it, the magnetic flux linked with each turn of the solenoid is 4 $\times 10^{-3}$ Wb. The self-inductance of the solenoid is

Out of the following options which one can be used to produce a propagating electromagnetic wave?

Two identical charged spheres suspended from a common point by two massless strings of lengths $l$, are initially at a distance d(d < < $l$) apart because of their mutual repulsion. The charges begin to leak from both the spheres at a constant rate. As a result, the spheres approach each other with a velocity v. Then v varies as a function of the distance x between the spheres, as

Two non-mixing liquids of densities $\rho$ and n$\rho$ (n > 1) are put in a container. The height of each liquid is h. A solid cylinder of length L and density d is put in this container. The cylinder floats with its axis vertical and length pL (p < 1) in the denser liquid. The density d is equal to

The ratio of escape velocity at earth (ve) to the escape velocity at a planet (vp) whose radius and mean density are twice as that of earth is

At what height from the surface of earth the gravitation potential and the value of g are $-$5.4 $\times$ 107 J kg${}^{-1}$ and 6.0 m s${}^{-2}$ respectively? Take the radius of earth as 6400 km.

The molecules of a given mass of a gas have r.m.s. velocity of 200 m s${}^{-1}$ at 27oC and 1.0 $\times$ 105 N m${}^{-2}$ pressure. When the temperature and pressure of the gas are respectively, 127oC and 0.05 $\times$ 105 N m${}^{-2}$, the r.m.s. velocity of its molecules in m s${}^{-1}$ is

A car is negotiating a curved road of radius R. The road is banked at an angle $\theta$. The coefficient of friction between the tyres of the car and the road is $\mu$s. The maximum safe velocity on this road is

The magnetic susceptibility is negative for

If the velocity of a particle is v = At + Bt2, where A and B are constants, then the distance travelled by it between 1 s and 2 s is

A long straight wire of radius $a$ carries a steady current $I$. The current is uniformly distributed over its cross-section. The ratio of the magnetic fields B and B', at radial distance $\frac{a}{2}$ and 2$a$ respectively, from the axis of the wire is

A square loop ABCD carrying a current $i$, is placed near and coplanar with a long straight conductor XY carrying a current $I$, the net force on the loop will be

A particle moves so that its position vector is given by $\vec{r} = \cos \omega t\, \hat{x} + \sin \omega t\, \hat{y},$ where $\omega$ is a constant. Which of the following is true?

A astronomical telescope has objective and eyepiece of focal lengths 40 cm and 4 cm respectively. To view an object 200 cm away from the objective, the lenses must be separated by a distance

The angle of incidence for a ray of light at a refracting surface of a prism is 45°. The angle of prism is 60°. If the ray suffers minimum deviation through the prism, the angle of minimum deviation and refractive index of the material of the prism respectively, are

Match the corresponding entries of column 1 with column 2. [Where m is the magnification

produced by the mirror]

From a disc of radius R and mass M, a circular hole of diameter R, whose rim passes through the centre is cut. What is the moment of inertia of the remaining part of the disc about a perpendicular axis, passing through the centre?

A disc and a sphere of same radius but different masses roll off on two inclined planes of the same altitude and length. Which one of the two objects gets to the bottom of the plane first?

A uniform circular disc of radius 50 cm at rest is free to turn about an axis which is perpendicular to its plane and passes through its centre. It is subjected to a torque which produces a constant angular acceleration of 2.0 rad s${}^{-2}$. Its net acceleration in m s${}^{-2}$ at the end of 2.0 s is approximately

A npn transistor is connected in common emitter configuration in a given amplifier. A load resistance of 800 $\Omega$ is connected in the collector circuit and the voltage drop across it is 0.8 V. If the current amplification factor is 0.96 and the input resistance of the circuit is 192 $\Omega$, the voltage gain and the power gain of the amplifier will respectively be

To get output 1 for the following circuit, the correct choice for the input is

Consider the junction diode as ideal. The value of current flowing through AB is

A refrigerator works between 4oC and 30oC. It is required to remove 600 calories of heat every second in order to keep the temperature of the refrigerated space constant. The power required is (Take 1 cal = 4.2 Joules)

A gas is compressed isothermally to half its initial volume. The same gas is compressed separately through an adiabatic process until its volume is again reduced to half. Then

A siren emitting a sound of frequency 800 Hz moves away from an observer towards a cliff at a speed of 15 m s${}^{-1}$. Then, the frequency of sound that the observer hears in the echo reflected from the cliff is

(Take velocity of sound in air = 330 m s${}^{-1}$)

An air column, closed at one end open at the other, resonates with a tuning fork when the smallest length of the column is 50 cm. The next larger length of the column resonating with the same tuning fork is

A uniform rope of length L and mass m1 hangs vertically from a rigid support. A block of mass m2 is attached to the free end of the rope. A transverse pulse of wavelength $\lambda$1 is produced at the lower end of the rope. The wavelength of the pulse when it reaches the top of the rope is $\lambda$2. The ratio $\lambda$ 2/$\lambda$1 is

In a diffraction pattern due to a single slit of width $a$, the first minimum is observed at an angle 30° when light of wavelength 5000 $\text{\AA}$ is incident on the slit. The first secondary maximum is observed at an angle of

The intensity at the maximum in a Young's double slit experiment is $I$0. Distance between two slits is d = 5$\lambda$, where $\lambda$ is the wavelength of light used in the expreriment. What will be the intensity in front of one of the slits on the screen placed at a distance D = 10d?

A body of mass 1 kg begins to move under the action of a time dependent force $\vec{F} = \left(2t\hat{i} + 3t^2\hat{j}\right)N,$ where $\hat{i}$ and $\hat{j}$ are unit vectors along x and y axis. What power will be developed by the force at the time t?