Physics
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
Related Questions
1 WH is equal to :
- 3600 J
- 360 J
- 36 J
- 3.6 J
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)
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
Write an expression for the electrical energy spent in flow of current through an electrical appliance in terms of current, resistance and time.