Question

A current I passes through a circular loop C and a solenoid AB is shown below.

What is the polarity of:
(i) the face of the loop you are looking at?
(ii) the end B of the solenoid?

Please give proper explanation....I have my boards tomorrow. ​

Answer 1

Answer:

According to Lenz law,

i) North pole of magnet is towards loop and it is approaching to loop so no of magnetic field lines

are increasing so polarity of loop will be north (N) for opposing increment in magnetic field lines

ii) As loop's polarity is north so field lines due to it reaching in solenoid will be increasing so for same opposing purpose polarity of solenoid also will be N

Answer 2

Answer:

i)North pole

ii)North Pole

reason :- Clock rule- If the current flowing through a circular coil is anticlockwise, then that face is north pole and opposite face is south pole