Electric motor converts mechanical energy into electrical energy.

Explain the Right-Hand Thumb Rule and the Maxwell's Corkscrew Rule to determine the direction of the magnetic field due to a current-carrying conductor.

$(a)$ Describe an activity to determine the direction of magnetic field produced by a current-carrying straight conductor. Also,show that the direction of the magnetic field is reversed on reversing the direction of current.
$(b)$ An $\alpha$-particle (which is a positively charged particle) enters a uniform magnetic field at right angles to it as shown below. Stating the relevant principle,explain in which direction will this $\alpha$-particle move?

Name four appliances wherein an electric motor,a rotating device that converts electrical energy to mechanical energy,is used as an important component. In what respect are motors different from generators?

Define a solenoid. How is it different from a coil?

Name two types of wiring systems adopted for domestic wiring.