Home
Class 12
PHYSICS
Only a fraction of the electrical energy...

Only a fraction of the electrical energy supplied to a tungsten light bulb is converted into visible light. If a 100 W light bulb converts 20% of the electrical energy into visible light `(lambda=662.6nm)`, then the number of photons emitted by the bulb per second is

A

`6.67 xx 10^(19)`

B

`2xx10^(28)`

C

`6xx10^(36)`

D

`30xx10^(19)`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • CATHODE RAY, PHOTOELECTRIC EFFECT AND X-RAYS

    BITSAT GUIDE|Exercise BITSAT Archives|6 Videos

  • ATOMIC STRUCTURE

    BITSAT GUIDE|Exercise BITSAT Archives|4 Videos

  • CURRENT ELECTRICITY

    BITSAT GUIDE|Exercise Bitsat Archives|26 Videos

Similar Questions

Explore conceptually related problems

An electric bulb converts electrical energy into

An electric bulb converts electric energy into heat energy.

A 124 W bulb converts only 15 % of the energy supplied to it into visible light of wavelength 640 nm . How many photons are emitted by the light bulb in one second ?

A blube emits light of lambda = 4500 Å . The bulb is rated as 150 watt and 8% of the energy is emitted as light. Number of photons emitted by bulb per second is : ["Take" hc = 12400 eVÅ]

A 100 W bulb is emmiting light of wavelength 300 nm .Calculate the number of photon emitted by the bulb in 1 min?

The power of a bulb is 60 milliwatt and the wavelength of light is 6000 Å. Calculate the number of photons/sec. emitted by the bulb ?

Name the optoelectronic device that convert electrical energy in to light