In the following circuit, find the total current supplied by the battery.

F6 Madhuri Engineering 30.06.2022 D4

This question was previously asked in
NHPC JE Electrical 5 April 2022 (Shift 1) Official Paper
View all NHPC JE Papers >
  1. 5 A
  2. 3 A
  3. 2.5 A
  4. 2 A

Answer (Detailed Solution Below)

Option 1 : 5 A
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Detailed Solution

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Concept:

The total active power supplied by a battery source is given by:

P = V × I

Where, P = Active power

V = Voltage 

I = Current 

Calculation:

F6 Madhuri Engineering 30.06.2022 D4

Total power supplied by battery = 15 + 10 + 20 = 45 W

45 = V × I

45 = 9 × I

I = 5A

KCET PHYSICS 2016 Jitendra Kumar Sunny 16.4.2020 2

  • There is no voltage rating so we can not apply the 'power in series' formula.
  • Also, this question is from the official paper of NHPC JE Electrical 5 April 2022 (Shift 1) Official Paper and the official answer is 5, In this question, the discrepancy is found.
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