Question

Which of the following are true about electricity and magnetism? I. An electric current can be produced by a changing magnetic force. II. A magnetic force can be produced by an electric current. III. Energy cannot be transferred by an electric current. IV. A magnetic force can attract a metal object only if the object is touching the magnet.

Answer 1

I. An electric current can be produced by a changing magnetic force.

II. A magnetic force can be produced by an electric current.

Answer 2

Answer;

I. An electric current can be produced by a changing magnetic force.

II. A magnetic force can be produced by an electric current.

Explanation;

• Electric current is the net movement of electric charges in a single direction, measured in amperes (A).
• Electric current produces a magnetic field. Electric currents and magnets exert force on each other, and this relationship has many uses.
• A temporary magnet, known as an electromagnet, can be made by passing electric current through a wire that is coiled around an iron core.
• A magnet can also be used to generate electricity. When a wire moves within a magnet's magnetic field, electricity is produced.