A solenoid is connected to a battery as shown in the figure, and a bar magnet is placed nearby. What is the direction of the magnetic force that this solenoid exerts on the bar magnet?
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The coercivity of a magnet is . What current should be passed through a solenoid of length 10 cm and the number of turns 50 that the magnet is demagnetized when inserted in it?
A bar magnet is positioned near a coil of wire, as shown in the figure below. What is the direction of the current in the resistor when the magnet is moved___
. What current should be passed through a solenoid of length 10 cm and the number of turns 50 that the magnet is demagnetized when inserted in it?
