KCET 2020 | Dual Nature of Radiation Question 16 | Physics

The following graph represents the variation of photocurrent with anode potential for a metal surface. Here $$I_1, I_2$$ and $$I_3$$ represents intensities and $$\gamma_1, \gamma_2, \gamma_3$$ represent frequency for curves $$1,2$$ and $$3$$ respectively, then

KCET 2020 Physics - Dual Nature of Radiation Question 12 English

$$\gamma_1=\gamma_2$$ and $$I_1 \neq I_2$$

$$\gamma_1=\gamma_3$$ and $$I_1 \neq I_3$$

$$\gamma_1=\gamma_2$$ and $$I_1=I_2$$

$$\gamma_2=\gamma_3$$ and $$I_1=I_3$$

KCET 2019

MCQ (Single Correct Answer)

-0

An electron is moving with an initial velocity $$\mathbf{v}=v_0 \hat{\mathbf{i}}$$ and is in a uniform magnetic field $$\mathbf{B}=B_0 \hat{\mathbf{j}}$$. Then its de-Broglie wavelength

remains constant

increases with time

decrease with time

increase and decrease periodically

KCET 2019

MCQ (Single Correct Answer)

-0

Light of certain frequency and intensity incident on a photosensitive material causes photoelectric effect. If both the frequency and intensity are doubled, the photoelectric saturation current becomes

quadruple

doubled

halved

unchanged

KCET 2018

MCQ (Single Correct Answer)

-0

The number of photons falling per second on a completely darkened plate to produce a force of $6.62 \times 10^{-5} \mathrm{~N}$ is $n$. If the wavelength of the light falling is $5 \times 10^{-7} \mathrm{~m}$, then $n=$ $\ldots \ldots \ldots \times 10^{22}$. (Take, $h=6.62 \times 10^{-34} \mathrm{~J}-\mathrm{s}$ )

0.2

3.3

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