A 60 V - 10 W electric lamp is to be run on 100 V - 60 Hz mains. Calculate the inductance of the choke coil required. If a resistor is to be used in place of choke coil to achieve the same result, calculate its value.

A 80 V - 800 W heater is to be operated on a 100 V - 50 Hz a.c. supply. Calculate the inductance of the choke required.

A 50 V-10 W electric lamp is connected across an AC source of 100 V - 50 Hz. (i) Find the inductance of the choke required . (ii) If a resistoer is used in place of the choke coil to obtain the same result find its value.

A 20 V - 5 W lamp is to run on 200 V- 50 Hz a.c. mains. Find the capacitance of a capacitor required to run the lamp.

A 10 V -10 W lamp is to run on 220 V -50 Hz AC mains . What will be the required value of capacitance of a capacitor to run the lamp ?

An electric lamp which runs at 80 volt d.c. and consumes 10 ampere is connected to 100 volt, 50 Hz a.c. mains. Calculate the inductance of the choke required.

An eletric lamp which runs 100 V d.c and 10-A currect is connected to 200 V ,50 cycle AC mains .Calcualate the inducatance of the choke required.

An AC flourescent lamp needs 1-A currect at 100 V Calculate the inducatance of the choke required to run the lamp on a 50 Hz -220 V supply.

A 50 Omega electric heater is connected to 100 V. 60 Hz ac sinusoidal supply.

The specification on a heater coil is 250 V, 500 W . Calculate the resistance of the coil. What will be the resistance of a coil of 1000W to operate at the same voltage?