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NEET2015PhysicsCurrent ElectricityActual

The ammeter shown in figure consists of a 480 coil connected in parallel to a 20 shunt. The reading of ammeter is

Options

  1. A0.125 A
  2. B1.67 A
  3. C0.13 A
  4. D0.67 A

Correct answer

A. 0.125 A

Step-by-step solution

The equivalent resistance of the ammeter is (480)(20) 480+20 =19.2 The equivalent resistance of the circuit is 1408+19.2 =160 The current, i= 20 ~V 160 =0.125 ~A Hence, ammeter reading is 0.125 A .

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