Question

Two resistors 3 ohm and 9 ohm are connected in parallel across a 9 volt battery. Calculate:
1. Power supplied by the battery
2. Power dissipated in each resistor

Answer 1

Answer:

Voltage= 9v

3Ω and 9Ω connected in parallel

Equivalent Resistance (R)= 3x9/3+9

                                         = 27/12

                                         = 9/4 Ω

Power= v²/R

= 9² x 4/9

= 81 x 4/9

= 36 Watts