KCET PYQs for Faradays Laws of induction with Solutions: Practice KCET Previous Year Questions

1.

A metallic rod of length 1 m held along east-west direction is allowed to fall down freely. Given horizontal component of earth’s magnetic field B_H = 3 × 10^-5 T. The emf induced in the rod at an instant t = 2s after it is released is ( Take g = 10 ms^-2 )

• 3 × 10^-3 V
• 3 × 10^-4 V
• 6 × 10^-3 V
• 6 × 10^-4 V

2.

Two identical circular coils $A$ and $B$ are kept on a horizontal tube side by side without touching each other. If the current in the coil $A$ increases with time, in response, the coil $B$

• is attracted by $A$
• remains stationary
• is repelled
• rotates

3.

A square loop of side 2 cm enters a magnetic field with a constant speed of 2 cm s^-1 as shown. The front edge enters the field at t = 0s. Which of the following graph correctly depicts the induced emf in the loop?
( Take clockwise direction positive )

4.

The current following through an inductance coil of self inductance 6 mH at different time instants is as shown. The emf induced between t = 20s and t = 40s is nearly

• 2 × 10^-2 V
• 3 × 10^-4 V
• 4 × 10^-3 V
• 30 × 10² V