When a point source is kept at a distance $d$ from the cathode plate, the stopping potential was found to be $V_{s}$ . If the distance is now reduced to half of the original, the change in stopping potential is,

0 %

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

$50 %$

No worries! We‘ve got your back. Try BYJU‘S free classes today!

$100 %$

No worries! We‘ve got your back. Try BYJU‘S free classes today!

200 %

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $0 %$
Stopping potential is, $V_{s} = E - ϕ_{0}$ , where $E$ and $ϕ_{0}$ , both are in $eV$ .

As the distance between source and cathode plate is changed, the intensity of incident light changes. As the stopping potential does not depend on intensity, so the stopping potential is also independent of the distance of the source from the cathode plate.

Hence, $(A)$ is the correct answer.

Why this question?
Concept: distance of source from the cathode plate determines Intensity of radiation falling on it, whereas, stopping potential is independent of intensity of radiation.

Suggest Corrections

Similar questions

Q. A source of light is placed at a distance

4 m

from a photocell and the stopping potential is then 7.7 volt. If the distance is halved, the stopping potential now will be:

Q. When a monochromatic source of light is at a distance of 0.2 m from a photocell, the stopping potential (cut off voltage) and the saturation current are found to be 1 volt and 27 mA respectively. If the same source is placed at a distance 0.6 m from the cell then

Q. When the light source is kept

20 c m

away from a photo cell, stopping the potential of

0.6 V

is obtained. When the source is kept

40 c m

away, the stopping potential will be:

When the light source is kept 20 cm away from a photo cell, stopping potential 0.6 V is obtained. When source is kept 40 cm away, the stopping potential will be

Q. When a monochromatic point source of light is at a distance of 0.2 m from a photoelectric cell, the cut-off voltage and the saturation current are, respectively, 0.6 V and 18.0 mA. If the same source is placed 0.6 m away from the photoelectric cell, then

Join BYJU'S Learning Program

When a point source is kept at a distance d from the cathode plate, the stopping potential was found to be Vs. If the distance is now reduced to half of the original, the change in stopping potential is,

When a point source is kept at a distance $d$ from the cathode plate, the stopping potential was found to be $V_{s}$ . If the distance is now reduced to half of the original, the change in stopping potential is,