Light Bulb

ritwik06

A light bulb is completely covered with a thin coat of black soot in a room maintained at 20 degree celsius. If the shell has an equilibrium temperature of 100 degree celsius. What is the wattage of the bulb?

I cant understand how to do it. I am a student of 9th standard.

Andrew Mason

Quote by ritwik06

A light bulb is completely covered with a thin coat of black soot in a room maintained at 20 degree celsius. If the shell has an equilibrium temperature of 100 degree celsius. What is the wattage of the bulb?

I cant understand how to do it. I am a student of 9th standard.

Do they give you the radius or area of the lightbulb?

AM

ritwik06

Quote by Andrew Mason

Do they give you the radius or area of the lightbulb?

AM

No nothing at all!!!!!!!!!!!!!!!!!!! I have provided everything given at the question. If it isnt possible just tell me a way hot to prove that the given data is insufficient.

OlderDan

Quote by ritwik06

No nothing at all!!!!!!!!!!!!!!!!!!! I have provided everything given at the question. If it isnt possible just tell me a way hot to prove that the given data is insufficient.

This should give you what you need. The size of the bulb does matter.

http://hyperphysics.phy-astr.gsu.edu...stefan.html#c1

Similar Threads for: Light Bulb
Thread	Forum	Replies
w light bulb	Introductory Physics Homework	1
The light bulb.	Brain Teasers	5
Light Bulb in Ohm Law	Introductory Physics Homework	4
once upon a light bulb...	Advanced Physics Homework	2
Light bulb	General Engineering	6

ritwik06	Light Bulb Tweet A light bulb is completely covered with a thin coat of black soot in a room maintained at 20 degree celsius. If the shell has an equilibrium temperature of 100 degree celsius. What is the wattage of the bulb? I cant understand how to do it. I am a student of 9th standard.