The figure shows a long solenoid, a cylindrical coil of a number of turns of insulated copper wire,
connected to a battery and key. When key is closed,
a. Which end of the solenoid is a N-pole and which end is a S-pole?
b. Draw the magnetic field lines in the solenoid.
c. Suggest any two ways to increase the strength of magnetic field inside the solenoid.
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Explanation:
a is South B is north that's all I know
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