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In the given circuit, Reading of ammeter is 1 A . If each of the 4 Ω resistor is replaced by 2 Ω resistor, the reading of ammeter will become nearly -

Options

  1. A1 . 11 A
  2. B1.25 A
  3. C1.34 A
  4. D1.68 A

Correct answer

A. 1 . 11 A

Step-by-step solution

If r A = Ammeter Resistance then ⇒   1   A = 10 V R e q = 10 9 + r A ⇒   r A = 1   Ω When 4   Ω resistors are replaced by 2   Ω , then ⇒   I = 10 8 + 1 = 10 9   A = 1.11   A

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