At the time of the short circuit, the current in circuit : (a) reduces substantially (b) does not change (c) increases heavily (d) vary continuously

Which of the following correctly describes the magnetic field near a long straight wire? (a) The field consists of straight lines perpendicular to the wire. (b) The field consists of straight lines parallel to the wire. (c) The field consists of radial lines originating from the wire. (d) The field consists of concentric circles centred on the wire.

What precautions should be taken to avoid the overloading of domestic electric circuits?

An electric oven with 2 kW power rating is operated in a domestic electric circuit (220 V) that has a current rating of 5 A. What result do you expect? Explain.

Name two safety measures commonly used in electric circuits and appliances.

A positively-charged particle (alpha-particle) projected towards the west is deflected towards the north by a magnetic field. The direction of magnetic field is : (a) towards south (b) towards east (c) downward (d) upward