Define DC supply of electricity

Define AC supply of electricity .

Name some devices which use DC supply of electricity.

Name domestic appliances which run on AC supply of electricity.

Which are the two types of supplies of electricity?

Define dipole moment of electric dipole.

Define the SI unit of electrical current.

State the expression for force acting per unit length of each of the straight wire conducting current. Hence define SI unit of electric current.

Give reasons A computer will not work unless electricity is supplied to it.

An electric tungsten bulb is connected into a home circuit. The home electric supply runs at 220 V potential difference. When switched on, a current of 0.45 A flows through the bulb What must be power (wattage)of the bulb? if it is kept on for 10 hours, how many units of electricity will be consumed?