Fuse is always connected in
live wire
neutral
earth
none of these
An electrical appliances is rated 1500 W 250 V. This appliancie is connected to 250 V main. The current drawn is
6 A
4 A
12 A
15 A
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
Which of the following wires have same potential?
Neutral and Live
Neutral and Earth
Live and Earth
Both a and b
The electric appliances in a house are connected in
series
parallel
either series or parallel
both in series and parallel
When a current I flows through a resistance R for time t, the electrical energy spent is given by
IRt
I2Rt
IR2t
I2R/t
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
The on-off device used in circuit is
Fuse
MCB
Switch
3 pin plug
1 Wh =
360 J
