What causes an electric current in a wire?

a. electric fields cause atoms to move in the wire.

b. electrons flow because of electrical attraction and repulsion.

c. electrons move because of heat.

d. electrons build up in the wire and create a charge

The correct option is B.

Explanation:

The rate at which the electrons flow constitutes the electric current. The force is requires to make current flow through the wire.

There is a flow of the electrons in a wire due to the potential difference in the circuit.

The electrons always flow from high potential to the low potential. The electric force between the charged particles are important in electricity.

Unlike charges attract each other.The electrons are attracted towards the positive terminal of the battery. So, there are electrical attraction and electrical repulsion. Electrons flow because of electrical attraction and repulsion.

Therefore, the correct option us B.

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