Fuse is always connected in
live wire
neutral
earth
none of these
Two bulbs are marked 60 W, 220 V and 60 W, 110 V respectivelly. The ratio of resistance is:
4:1
2:1
2:4
4:3
Current through a 12 V tungsten filament lamp connected to a 12 V accumulator of negligible resistance of 3 A. Calculate resistance of filament?
4 Ω
6 Ω
12 Ω
24 Ω
The on-off device used in circuit is
Fuse
MCB
Switch
3 pin plug
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
A bulb rated 100 W, 220 V. The resistance of its filament while glowing is
250 Ω
100 Ω
484 Ω
625 Ω
1 kWh =
3.6 J
3.6 x 106 J
3.6 x 10-6 J
3600 J
Circuit breaker device which can be used in place of fuse wire in domestic electric wiring is called
CBD
DCB
MCD
A radio set of 60 watts runs for 50 hours.How many 'units ' (kWh) of electricaly energy are consumed ?
6 kWh
9 kWh
3 kWh
30 kWh
The electric appliances in a house are connected in
series
parallel
either series or parallel
both in series and parallel
