MHT CET 2025 19th April Morning Shift | Dual Nature of Radiation Question 5 | Physics

Light of wavelength $\lambda$ strikes a photoelectric surface and electrons are ejected with energy E . If $E$ is to be increased to twice the original value, the wavelength changes to $\lambda_1$

$\lambda_1<\lambda / 2$

$\lambda_1=\lambda$

$\lambda_1>\lambda / 2$

$\lambda_1=\lambda / 2$

MHT CET 2025 19th April Morning Shift

MCQ (Single Correct Answer)

-0

In a photoelectric experiment, if the intensity of incident light is doubled and the frequency is kept slightly greater than threshold frequency, then the saturation photoelectric current

remains constant

is halved

is doubled

becomes four times

MHT CET 2024 16th May Evening Shift

MCQ (Single Correct Answer)

-0

Kinetic energy of a proton is equal to energy $E$ of a photon. Let ' $\lambda_1$ ' be the de-Broglie wavelength of proton and ' $\lambda_2$ ' be the wavelength of photon. If $\left(\frac{\lambda_1}{\lambda_2}\right) \propto E^n$ then the value of ' $n$ ' is

0.5

MHT CET 2024 16th May Evening Shift

MCQ (Single Correct Answer)

-0

A point source of light is used in a photoelectric effect. If the source is removed farther from the emitting metal, then the stopping potential will

increase.

decrease.

remain constant.

either increase or decrease.

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