When a current I flows through a resistance R for time t, the electrical energy spent is given by
IRt
I2Rt
IR2t
I2R/t
Which of the following wires have same potential?
Neutral and Live
Neutral and Earth
Live and Earth
Both a and b
According to International convention of colour coding of insulation of wires in a cable :
live is red, neutral is blue and earth is brown
live is red, neutral is green and earth is black
live is brown, neutral is blue and earth is black
live is brown, neutral is light blue and earth is green
1 Wh =
3600 J
3.6 x 106 J
360 J
3.6 J
Which of the following wire is also called phase wire?
Neutral wire
Earth wire
Live wire
At what voltage is the electric power generated at the power generating station?
11 kV
25 kV
21 kV
40 kV
Circuit breaker device which can be used in place of fuse wire in domestic electric wiring is called
CBD
DCB
MCD
MCB
Factors which does not affect heat dissipation by a conductor is:
current
time
resistance
voltage
Out of 3 fuses with current ratings 5 A, 10 A, 15 A which one is to be connected in a geyser circuit marked 3 kW, 220 V.
15 A
5 A
10 A
A bulb rated 100 W, 220 V. The resistance of its filament while glowing is
250 Ω
100 Ω
484 Ω
625 Ω