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CBSE Class 10 Answered

What is the relation between the brightness of a bulb and it's power and voltage?
Asked by | 19 Feb, 2010, 09:55: PM
answered-by-expert Expert Answer

1/ Yes. According to Ohm's Law, V = IR, for constant V, current is inversely propotional to the resistance.

2/ Yes. A wire of higher resistance should produce more light, and it's due to "friction" i.e. frequent collisions of electrons with themselves and atoms.

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Answered by | 20 Feb, 2010, 06:24: AM

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