GEOLOGY

Detailed explanation-1: -The magnetic field generated is always perpendicular to the direction of the current and parallel to the solenoid. Hence if we reverse the current the direction of magnetic field also reverses.

Detailed explanation-2: -Explanation : If you wrap your hand around a current-carrying wire with your thumb in the direction of current, the magnetic field will be in the direction of your fingers. As a result, reversing the current reverses the magnetic field’s direction.

Detailed explanation-3: -The answer is yes. If we temporarily ignore the condition that the change in the magnetic field be instantaneous, we can generate an oscillating current by spinning a permanent magnet near a coil in such a way that the magnet’s North and South poles are changing places as the magnet rotates.

Detailed explanation-4: -The direction of force on a current carrying conductor placed in a magnetic field can be reversed by reversing the direction of current flowing in the conductor.

Detailed explanation-5: -The current will flow in the direction the thumb is pointing, and the magnetic field direction will be described by the direction of the fingers. This means when you change the direction of the current, you also change the direction of the magnetic field.