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Question

The power supplied by the battery will be :
  1. 15 W
  2. 24 W
  3. 3.6 W
  4. 20 W

A
15 W
B
3.6 W
C
20 W
D
24 W
Solution
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In this case, the resistances 4 ohms and 6 ohms are connected in parallel.
The total resistance is 14+16=10.416=2.4ohms. The voltage is given as 6 V.
The power is calculated as follows.
P=VI=V2R(asI=VR).
Therefore, P=622.4=15W.
Hence, the power supplied by the battery is 15 W.

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