## An ammeter is to be constructed which can read currents up to 2 A. If the coil has a resistance of 25 ohm and takes 1 mA for full-scale deflection, what should be the resistance of the shunt used ?

Q. An ammeter is to be constructed which can read currents up to 2 A. If the coil has a resistance of 25 ohm and takes 1 mA for full-scale deflection, what should be the resistance of the shunt used ? (a) 12.5 mΩ (b) 1.25 mΩ (c) 125 mΩ (d) 0.125 mΩ Ans: A

## Find the potential difference Va – Vb in the circuits shown in figure.

Q. Find the potential difference Va – Vb in the circuits shown in figure. (a) 0 (b) 1A (c)1.2A (d) 0.5A Ans: C

## The potentiometer wire AB shown in figure is 50cm long. When AD = 30cm, no deflection occurs in the galvanometer. Find R

Q. The potentiometer wire AB shown in figure is 50cm long. When AD = 30cm, no deflection occurs in the galvanometer. Find R (a) 3Ω (b) 3.5Ω (c) 4Ω (d)2.5Ω Ans: C

## Find the charge on the capacitor shown in figure.

Q. Find the charge on the capacitor shown in figure. (a) 3 μC (b) 2 μC (c) 4 μC (d) 1.5 μC Ans: C

## Find the equivalent resistances of the networks shown in figure between the points a and b.

Q. Find the equivalent resistances of the networks shown in figure between the points a and b. (a) 5/7 r Ω (b) 5/8 rΩ (c) 8/5 r Ω (d) 7/5 r Ω Ans: B