Which type of current is obtained from a battery?

What is short-circuiting?

Why is pure iron not used for making permanent magnets? Name one material used for making permanent magnets. Describe how permanent magnets are made electrically. State two examples of electrical instruments made by using permanent magnets.

What is a solenoid?

Choose the incorrect statement from the following regarding magnetic field lines.

The flow of a current in a circular loop of a wire creates a magnetic field at its centre. How can the existence of this field be detected? State the rule which helps to predict the direction of this magnetic field.