Two lamps, one rated 100 W at 220 V, and the other 60 W at 220 V, are connected in parallel to electric mains supply. What current is drawn from the line if the supply voltage is 220 V?
0.727 A
0.625 A
0.825 A
1.35 A
A bulb of rating 100 W, 220 V is used for 5 hours daily for a month of 30 days. How many units of electrical energy are consumed by the bulb in one month?
15 units
20 units
5 units
30 units
An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, the power consumed will be
100 W
75 W
50 W
25 W
How many 176 Ω resistors (in parallel) are required to carry 5 A on a 220 V line?
4
3
5
6
A geyser has a rating of 2 kW, 240 V. What is the cost of using it for 30 minutes, if the cost of electricity is Rs.3 per commercial unit?
Rs.3
Rs.6
Rs.9
Rs.15
An electrical appliance is rated 1500 W, 250 V. This appliance is connected to 250 V mains. Calculate the cost of electrical energy consumed @ Rs.2.50 per kWh.
Rs.200
Rs.350
Rs.225
Rs.420
At what voltage and frequency is the a.c. supplied to our houses?
220 V, 50 Hz
11 V, 1/50 Hz
220 V, 100 Hz
11 V, 50 Hz
At what voltage is the electric power generated at the power generating station?
11 kV
21 kV
25 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
The electrical appliances in the houses are connected with each other in
parallel
series
a combination of series and parallel circuits
either series or parallel
