Physics
A bulb is rated 100 W-220 V. It is being used at 110 V supply. The power consumed by bulb is:
- 100 W
- half of 100 W
- nearly 25 W
- none of the above
Related Questions
The amount of heat produced in a wire on passing a current through it depends on:
- the resistance of wire
- the square root of current I passing through the wire.
- the time for which current is passed.
- Both (1) and (3)
An electrical appliance has a rating 100 W, 120 V. The resistance of element of appliance when in use is —
- 1.2 Ω
- 144 Ω
- 120 Ω
- 100 Ω
Write an expression for the electrical energy spent in flow of current through an electrical appliance in terms of current, resistance and time.
Write an expression for the electrical power spent in flow of current through a conductor in terms of (a) resistance and potential difference, (b) current and resistance.