Question

Which of these situations would generate electrical current in a wire? Check all that apply.

moving a magnet into a solenoid
moving a magnet out of a solenoid
holding a magnet steady inside a solenoid
holding a solenoid steady outside a magnet
moving a solenoid in a magnetic field

Answer 1

A,B,E

Step-by-step explanation:

edge

Answer 2

moving a magnet into a solenoid

moving a magnet out of a solenoid

moving a solenoid in a magnetic field

Step-by-step explanation:

A conduction coil wrapped around an iron core forms a solenoid. When current is passed through the coil, it generates magnetic field. Thus, solenoid is an electromagnet.

From Faraday's law: A changing magnetic field induces electromotive force across a conduction wire placed in it.

Induced emf is the rate of change magnetic flux.

`e = -(d\phi)/(dt) = - (dB A)/(dt)`

Electric current can be generated suing a solenoid. When a magnet is moved in or out of the coil, current flows in the coil. This is because, a changing magnetic field induces emf across the coil. Current can also be generated by moving the solenoid into the magnetic field.