The cathode of a photoelectric cell is change | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The photoelectric current in a cell depends on the number of photoelectrons emitted per unit time.This number is directly proportional to the inte

Vedclass · Accepted Answer

$I_1 = I_2$

Vedclass · Answer

(A) The photoelectric current in a cell depends on the number of photoelectrons emitted per unit time.This number is directly proportional to the intensity of the incident light and the quantum efficiency of the cathode material.The work function $W$ determines the threshold frequency,but it does not affect the number of photoelectrons emitted for a given intensity of incident light,provided the energy of the incident photons $h
u$ is greater than the work function $(h
u > W)$.Since the intensity of the incident light and all other experimental conditions remain unchanged,the number of photoelectrons emitted per second remains the same.Therefore,the photoelectric current remains constant,i.e.,$I_1 = I_2$.

The cathode of a photoelectric cell is changed such that the work function changes from $W_1$ to $W_2$ $(W_2 > W_1)$. If the current before and after the change are $I_1$ and $I_2$ respectively,with all other conditions remaining unchanged,then (assuming $h\nu > W_2$):

Similar Questions

If $x^y \cdot y^x = 16$,then $\frac{dy}{dx}$ at $(2, 2)$ is

If $\tanh ^{-1} x = a \log \left(\frac{1+x}{1-x}\right)$,$|x| < 1$,then $a$ is equal to

The figure shows three resistor configurations $R_1, R_2$,and $R_3$ connected to a $3\,V$ battery. If the power dissipated by the configurations $R_1, R_2$,and $R_3$ is $P_1, P_2$,and $P_3$ respectively,then:

$\lim _{x \rightarrow 0} \frac{\sin \left(\pi \cos ^2 x\right)}{x^2}$ is equal to

Which of the following statements is incorrect?

Vedclass Test Series

Exam Paper Generator

Online Exam Module