A circuit contains an ammeter, a battery of 30 v and a resistance 40.8 ohm all connected in series. If the…

A circuit contains an ammeter, a battery of 30 v and a resistance 40.8 ohm all connected in series. If the ammeter has coil of resistance 480 ohm and a shunt of 20 ohm, the reading in the ammeter will be:
  1. 0.25 A
  2. 2 A
  3. 1 A
  4. 0.5 A

Solution


Resistance of ammeter =480×20480+20=19.2Ω
i=3040.8+19.2=0.5 A

Asked in: NEET 2015 (Phase 2)

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