1. French scientist Andre-Marie Ampère suggested that a magnet should also exert an equal and opposite force on a current-carrying conductor.

2. A current-carrying wire has its own magnetic field.

3. A current-carrying wire attracts a magnetic material like a normal bar magnet.

4. When the current is withdrawn or the switch is closed, there is no magnetic effect in that case.

5. This phenomenon was called the magnetic effect of current.

1. It was held in the year 1734 and was presided over by Jai Singh and other prominent rulers of different regions of Rajasthan.

2. The objective of the meeting was to unite the forces of various Rajput tribes and to observe and check the increasing invasions of foreigners on their lands.

3. During that period, the Marathas also started invading lands and were gaining prominence.

4. Rajput leaders soon realized that Mughal power was unable to resist Maratha expansion and decided to hold a conference at Hurda to discuss the terms of a united Rajputana front against the Marathas.

5. After prolonged deliberations, an agreement was signed on 17 July 1734.