Electricity and Magnetism – Definition

Question 1 of 5

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What is alternating current (a.c.), and how does it differ from direct current (d.c.)?

Alternating current (a.c.) is a type of where the of current flow repeatedly, whereas direct current (d.c.) consists of flowing in one direction only.

Question 2 of 5

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Define electric current.

Question 3 of 5

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What is an electromagnet, and how is it created?

An electromagnet is a magnet produced by passing an through a soft wound on a of wire.

Question 4 of 5

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Explain the concept of electromagnetic induction.

Electromagnetic induction is the production of a or is at rest in a across a conductor when it moves through a magnetic field.

Question 5 of 5

1 point(s)

Define electromotive force (e.m.f.).

Electromotive force (e.m.f.) is the electrical by a source in moving a around a complete .