NEET Physics Current Electricity Questions Solved

NEET - 2015

A circuit contains an ammeter, a battery of 30 V and a resistance 40.8Ω all connected in series. If the ammeter has a coil of resistance 480Ω  and a shunt of 20Ω then reading in the ammeter will be

(a) 0.5A

(b) 0.25A

(c) 2A

(d) 1A

Effective resistance of a circuit 


Reff=40.8+480 x 20/480 + 20

=40.8+19.2=60Ω 

So,current flowing across ammeter,

I=V/R=30/60=1/2=0.5A

Hence,reading of ammeter=0.5A

Difficulty Level:

  • 59%
  • 24%
  • 11%
  • 8%
Crack NEET with Online Course - Free Trial (Offer Valid Till September 17, 2019)