Student Login

Home›Chapters›Dual Nature of Radiation and Matter PYQs›Photoelectric Effect: Einstein's Equation›Question 7

MHT CET 2026 (13 Apr, Shift 1) · Photoelectric Effect: Einstein's Equation

Photoelectric Effect: Einstein's Equation question from MHT CET 2026 (13 Apr, Shift 1)

Q7MHT CET 2026 · 13 APR · SHIFT 1Easy

Photoelectric Effect: Einstein's Equation

Energy of the incident photons on the photosensitive metal surface is 3W and then 5W where 'W' is the work function of that metal. The ratio of velocities of the emitted photoelectrons is

Show answer and solution

Answer: (b)

$\frac{1}{2}mv^2 = E - W$ , so $v \propto \sqrt{E - W}$ .
$K_1 = 3W - W = 2W$ , $K_2 = 5W - W = 4W$
$\frac{v_1}{v_2} = \sqrt{\frac{2W}{4W}} = \frac{1}{\sqrt{2}}$
So the answer is (b) $1 : \sqrt{2}$ .

Report a mistake

More questions on Photoelectric Effect: Einstein's Equation

When photons of energy hν fall on a metal plate of work function W₀, photoelectrons of…MHT CET 2026 (14 May, Shift 2)
The frequency of the incident light falling on a photosensitive metal plate is doubled…MHT CET 2026 (13 May, Shift 1)
A light wave described by E = 60[sin (3 × 10¹⁵)t + sin (12 × 10¹⁵)t] (in SI units) falls…JEE Main 2026 (21 Jan, Shift 1)
When a metallic surface is illuminated with radiation of wavelength λ, the stopping…MHT CET 2026 (19 May, Shift 2)
When a certain metal surface is illuminated with a light of wavelength λ, the stopping…MHT CET 2026 (15 May, Shift 2)
When light of wavelength ' λ ' is incident on a photosensitive surface, the stopping…MHT CET 2026 (19 Apr, Shift 2)
A photoelectric surface is illuminated successively by monochromatic light of wavelength…MHT CET 2026 (19 Apr, Shift 1)
When a metallic surface is illuminated with a radiation of wavelength ' λ ', the stopping…MHT CET 2026 (15 Apr, Shift 2)