Physics
When a current I flows through a resistance R for time t, the electrical energy spent is 1. IRt 2. I<sup>2</sup>Rt 3. IR<sup>2</sup>t 4.
Related Questions
1 WH is equal to :
- 3600 J
- 360 J
- 36 J
- 3.6 J
1 kWh is equal to:
- 3600 J
- 3.6 x 105 J
- 3.6 x 106 J
- 3.6 x 104 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)
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