Question

A moving coil galvanometer has 1000 turns and each turn has an area 2.0 cm². The magnetic field produced by the magnet is 2 x 10^-2 tesla. The deflection in the coil is 30° when a current of 10 mA is passed through it. Find the torsional couple of the suspension wire. ​

Answer 1

Answer:

When a candle burns, both physical and chemical changes occur. Physical Changes: On heating, candle wax gets melted. Since it again turns into solid wax on cooling. So, the melting of wax and vapourisation of melted wax are physical changes.