Which of the following wire is also called phase wire?
Neutral wire
Earth wire
Live wire
Both a and b
Which of the following wires have same potential?
Neutral and Live
Neutral and Earth
Live and Earth
The on-off device used in circuit is
Fuse
MCB
Switch
3 pin plug
A bulb is rated as 100 W - 250 V. The safe limit of current through filament of bulb while glowing is
100 A
0.1 A
2.5 A
0.4 A
What is the resistance of an electric arc lamp if the lamp uses 20 A when connected to 220 V line?
10 Ω
20 Ω
2 Ω
11 Ω
1 kWh =
3.6 J
3.6 x 106 J
3.6 x 10-6 J
3600 J
The bulb is rated as 100W - 250V, the resistance of its filament while glowing is,
100 Ω
250 Ω
625 Ω
2500 Ω
Fuse is always connected in
live wire
neutral
earth
none of these
Fuse wire is generally made of alloy of
Tin and Lead
Nichrome
Lithium
Copper
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
