CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Intensity in Photon Model

The photoelec...

Question

The photoelectric current in a photoelectric cell is 8 microampere.When the distance between the source and the cell is doubled then the photoelectric current becomes ____ microampere?

Open in App

Solution

Photo electric current is directly proportional to intensity.
and intensity is inversely proportional to distance^2
so I1/I2 = (d2/d1)^2
8/I2 = (2)^2
I2 = 8/4
I2 = 2 A

The photoelectric current will be 2 A.

Suggest Corrections

thumbs-up

1

Similar questions

Q. When a monochromatic point source of light is at a distance

0.2 m

from a photoelectric cell, the saturation current and cut-off voltage are

18.0 m A

0.6 V

. If the same source is placed

0.6 m

away from the photoelectric cell, then the saturation current and the stopping potential respectively are :

Q. When a point source of monochromatic light is at a distance of

0.2 m

from a photoelectric cell, the cut off voltage and the saturation current are

0.6 V

18 m A

respectively. If the same source is placed

0.6 m

away from the photoelectric cell then :

Q. When the distance of a point light source from a photocell is

r_{1}

, photoelectric current is

I_{1}

. If the distance becomes

r_{2}

, then the current is

I_{2}

I_{1} : I_{2}

Q. The photoelectric currents at distances

r_{1}

r_{2}

of light source from photoelectric cell are

I_{1}

I_{2}

respectively. The value of (

\frac{I_{1}}{I_{2}}

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

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Intensity in Photon Model

PHYSICS

Watch in App

explore_more_icon

Explore more

Intensity in Photon Model

Standard XII Physics

Join BYJU'S Learning Program

CrossIcon