Two lamps, one rated 100 W at 220 V, and the other 60 W at 220 V, are connected in parallel to electric mains supply. What current is drawn from the line if the supply voltage is 220 V?

A 2 kW boiler used for 1 hour everyday consumes electrical energy in thirty days equal to 

According to International convention of colour coding of insulation of wires in a cable :

Circuit breaker device which can be used in place of fuse wire in domestic electric wiring is called 

An electrical appliance is rated 1500 W, 250 V. This appliance is connected to 250 V mains. Calculate the cost of electrical energy consumed @ Rs.2.50 per kWh.

A 100 watt electric bulb is lighted for 2 hours daily and four 40 watt bulbs are lighted for 4 hours everyday. Calculate the energy consumed (in kWh) in 30 days.

A geyser has a rating of 2 kW, 240 V. What is the cost of using it for 30 minutes, if the cost of electricity is Rs.3 per commercial unit?

The frequency of AC used in India is 

There are two electric bulbs of 40 W and 100 W. Which one will be brighter when they are first connected in series and then in parallel?

1 kWh =