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NEET 2015
Exam
NEET
Year
2015
Subject
Physics
Chapter
Current Electricity

NEET 2015 · Physics · Current Electricity

A circuit contains an ammeter, a battery of 30 v and a resistance...

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

Options

  1. A0.25 A
  2. B2 A
  3. C1 A
  4. D0.5 A

Correct answer

D. 0.5 A

Step-by-step solution

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

Resistance of ammeter =480×20480+20=19.2Ω= \dfrac{480 \times 20}{480 + 20} = 19.2Ω

i=3040.8+19.2=0.5Ai = \dfrac{30}{40.8 + 19.2} = 0.5A

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