Download the app


Two circular loops of equal radii are placed coaxially at some separation.  The first is cut and a battery is inserted to drive a current in it.  The current changes slightly because of the variation in resistance with temperature (produced due to current in the circuit).  During this period, the two loops.

Remember concepts with our Masterclasses.

80k Users
60 mins Expert Faculty Ask Questions
Repel each other
Attract each other
Do not exert any force on each other.
repel each other independent of sense of current.

Ready to Test Your Skills?

Check Your Performance Today with our Free Mock Tests used by Toppers!

detailed solution

Correct option is B

When current starts flowing in a loop heat is generated in the resistance which increases the resistivity of the resistance R=ρlA .   Thus the resistance of the circuit increases.  This will reduce the current in that loop.  Thus from lenz law the flux passing through the other loop decreases and hence a current in same direction (as in loop 1) is produced.  Thus they both attract each other.

Talk to our academic expert!


Are you a Sri Chaitanya student?


Create Your Own Test
Your Topic, Your Difficulty, Your Pace

Similar Questions

The direction of induced current in the coils A and B in the coils A and B is the situation shown in the figure is

whats app icon
phone icon