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The circuit contains three ammeters A1, A2 and A3 with readings of A2 and A3...

Physics
WAEC 2018

The circuit contains three ammeters A1, A2 and A3 with readings of A2 and A3 shown as indicated in the diagram. Determine the reading of A1.

  • A. 2A
  • B. 3A
  • C. 5A
  • D. 8A
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Correct Answer: Option B
Explanation

Ammeters are connected in series so,

A3= A2 + A1

A1 = A3 - A1

= 5A - 2A

= 3A

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