Question

45. An electric lamp, whose resistance is 20 and a conductor of 40 resistance a connected to a 6v battery, then the amount of current passing through the circuit is A. 6 A. B. 24 A C. 0.25 A. D. 20 A​

Answer 1

Answer:

. the total resistance of the circuit =20Ω+4Ω=24Ω

b). The current through the circuit= current through the bulb= current through the conductor.

The current through the circuit=

the voltage of the battery

voltage applied

.

the current through the circuit =

24

6

amp

The current through the circuit = 0.25amp

c). The potential difference across the lamp and the conductor.

(i) The potential difference across the electrical lamp =0.25×20=5volt

(ii) The potential difference conductor =0.25×4=1 volt

d). Power can be calculated as

current through the lamp

voltage across the lamp

power=

0.25

5

→20W.