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 $I$ is directly proportional to the number of photoelectrons emitted per unit time.The number of photoelectrons emitted

Vedclass · Accepted Answer

$I_1 = I_2$

Vedclass · Answer

(A) The photoelectric current $I$ is directly proportional to the number of photoelectrons emitted per unit time.The number of photoelectrons emitted per unit time depends on the intensity of the incident light and the number of incident photons,provided the frequency of incident light $v$ is greater than the threshold frequency $(hv > W)$.Since the work function $W$ does not affect the number of photoelectrons emitted (it only affects the kinetic energy of the emitted electrons),the photoelectric current remains unchanged as long as the intensity of the incident light is constant.Therefore,$I_1 = I_2$.

The cathode of a photoelectric cell is changed from a work function $W_1$ to $W_2$ $(W_2 > W_1)$. If the photoelectric currents before and after the change are $I_1$ and $I_2$ respectively,and all other conditions remain constant,then which of the following is true? (Assume $hv > W_2$)

Similar Questions

Which is the major product of the following reaction?

Golden rice is a transgenic crop of the future with the following improved trait:

The phase difference between two waves,represented by $y_1 = 10^{-6} \sin \{100t + (x/50) + 0.5\} \ m$ and $y_2 = 10^{-6} \cos \{100t + (x/50)\} \ m$,where $x$ is in meters and $t$ is in seconds,is approximately .... $radians$.

If a body is moving in a circle of radius $r$ with a constant speed $v$,its angular velocity is

Minamata disease was caused due to the consumption of

Vedclass Test Series

Exam Paper Generator

Online Exam Module