Question

Calculate the power used in the 2Ω resistor in each of the following circuits:
(i) a 6 V battery in series with 1Ω & 2Ω resistors.
(ii) a 4 V battery in parallel with 12Ω & 2Ω resistors.​

Answer 1

Answer:

Explanation:

(1)Resistance net =3 ohm

current = 6/3 = 2A

power = $I^{2} R$ = 4*2 =8W

(2)  v across 2 ohm = 4V

power =$v^{2} /R$ = 16/2 =8W