The curve between current (i) and potential d | vedclass

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

Question

(D) In a photocell,when the potential difference $(V)$ between the cathode and anode is varied,the photoelectric current $(i)$ changes.At a specific n

Vedclass · Accepted Answer

Vedclass · Answer

(D) In a photocell,when the potential difference $(V)$ between the cathode and anode is varied,the photoelectric current $(i)$ changes.At a specific negative potential of the anode relative to the cathode,known as the stopping potential $(V_0)$,the photoelectric current becomes zero because even the most energetic photoelectrons are repelled.As the potential difference $(V)$ increases from this negative value towards positive values,the photoelectric current $(i)$ increases.Eventually,for a given intensity of incident radiation,the current reaches a maximum value called the saturation current,beyond which it remains constant even if the potential difference is further increased.

The curve between current $(i)$ and potential difference $(V)$ for a photo cell will be:

Similar Questions

The material of the cathode in a photocell is changed such that the work function of the surface changes from $W_1$ to $W_2$ $(W_2 > W_1)$. If the photocurrents emitted before and after changing the cathode surface are $I_1$ and $I_2$ respectively,and $hf > W_2$,then:

The number of photoelectrons emitted for light of frequency $v$ (higher than the threshold frequency $v_0$) is proportional to

The curve between the work function of a metal $(\phi_o)$ and its temperature $(T)$ will be:

The time taken by a photoelectron to come out after the photon strikes is approximately

$A$ photoelectric cell is illuminated by a point source of light kept at a distance $d$. If the distance is reduced to $d/2$,then the number of electrons emitted per second will be:

Vedclass Test Series

Exam Paper Generator

Online Exam Module