KCET 2023 | Dual Nature of Radiation Question 2 | Physics

In an experiment to study photoelectric effect the observed variation of stopping potential with frequency of incident radiation is as shown in the figure. The slope and $$y$$-intercept are respectively

KCET 2023 Physics - Dual Nature of Radiation Question 9 English

$$\frac{h}{e},-\frac{h v_0}{e}$$

$$\frac{h v}{e}, v_0$$

$$\frac{h v}{e},-\frac{h}{e}$$

$$h v_1-h v_0$$

KCET 2023

MCQ (Single Correct Answer)

-0

The energy gap of an LED is $$2.4 \mathrm{~eV}$$. When the LED is switched ON, the momentum of the emitted photons is

$$1.28 \times 10^{-27} \mathrm{~kg} \mathrm{~ms}^{-1}$$

$$2.56 \times 10^{-27} \mathrm{~kg} \mathrm{~ms}^{-1}$$

$$1.28 \times 10^{-11} \mathrm{~kg} \mathrm{~ms}^{-1}$$

$$0.64 \times 10^{-27} \mathrm{~kg} \mathrm{~ms}^{-1}$$

KCET 2022

MCQ (Single Correct Answer)

-0

The kinetic energy of the photoelectrons increases by $$0.52 \mathrm{~eV}$$ when the wavelength of incident light is changed from $$500 \mathrm{~nm}$$ to another wavelength which is approximately

400 nm

1250 nm

1000 nm

700 nm

KCET 2022

MCQ (Single Correct Answer)

-0

The de-Broglie wavelength of a particle of kinetic energy $$K$$ is $$\lambda$$, the wavelength of the particle, if its kinetic energy $$\frac{K}{4}$$ is

$$2 \lambda$$

$$\frac{\lambda}{2}$$

$$4 \lambda$$

$$\lambda$$

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