Home
Class 12
PHYSICS
Photo cells are used for the...

Photo cells are used for the

A

Reproduction of pictures from the cinema film

B

Reproduction of sound from the cinema film

C

Automatic switching of street light

D

(b) and (c) both

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ELECTRON, PHOTON, PHOTOELECTRIC EFFECT AND X-RAYS

    ERRORLESS |Exercise Cathode Rays and Positive Rays|11 Videos

  • ELECTRON, PHOTON, PHOTOELECTRIC EFFECT AND X-RAYS

    ERRORLESS |Exercise Photon and Photoelectric Effect|4 Videos

  • ELECTRO MAGNETIC INDUCTION

    ERRORLESS |Exercise SET|20 Videos

  • ELECTRONICS

    ERRORLESS |Exercise Selv Evaluation Test|23 Videos

Similar Questions

Explore conceptually related problems

Photo diodes are used is

In a p-n junction photo cell, the value of the of the photo electromotive force produced by monochromatic light is proportional to

In a p-n junction photo cell, the value of the photo electromotive force produced by monochromatic light is proportional to

Photo cell is a device to

The work function of lithium and copper are 2.3 eV and 4.0 eV respectively. Which of these metals will be useful for the photo-electric cell working with visible light? Explain.

Photo cell is a device in which light energy is converted into

Assertion. Ionizing radiations are harmful for the living organisms. Reason. They form toxic photo products in the cells.

If the distance of 100 Watt lamp is increased from a photocell, the saturation current i in the photo cell varies with distance d as