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
waec 2018physics

The correct answer is B. 3A

Ammeters are connected in series so,

A3= A2 + A1

A1 = A3 - A1

= 5A - 2A

= 3A

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