Question

Повернется ли магнитная стрелка, находящаяся возле провода с током, если направление тока в цепи изменить?

Answer 1

Если направление электрического тока в проводнике поменять, то стрелка повернется в другую сторону, так как изменение направления тока вызывает изменение направления магнитного поля.

Answer 2

Will the magnetic needle, located near a wire with current, turn if the direction of the current in the circuit is changed?

Yes, the magnetic needle will turn if the direction of the current in the circuit is changed. This phenomenon is known as the Ampere's Law, which states that a magnetic field is produced around a current-carrying wire. The direction of the magnetic field can be determined using the right-hand rule, where the thumb points in the direction of the current and the curled fingers indicate the direction of the magnetic field lines.

When the direction of the current in the wire is changed, the magnetic field around the wire also changes. As a result, the magnetic needle, which is sensitive to magnetic fields, will experience a force and turn in response to the change in the magnetic field.