Home
Class 10
PHYSICS
A heater draws 1100 W at 220 V.Calculate...

A heater draws 1100 W at 220 V.Calculate the kilowatt hours consumed in a week if the heater is used daily for four hours at the rated voltage .

Text Solution

Verified by Experts

The correct Answer is:
30.8 kWh
Promotional Banner

Similar Questions

Explore conceptually related problems

Two lamps, one rated 100W 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 220V ?

A resistor of 200 Omega and a capacitor of 15.0 muF are connected in series to a 220 V, 50 Hz ac source. (a) Calculate the current in the circuit, (b) Calculate the voltage (rms) across the resistor and the capacitor. Is the algebraic sum of these voltages more than the source voltage? If yes, resolve the paradox.

A resistor of 200 Omega and a capacitor of 15.0 muF are connected in series to a 220V, 50Hz as source . (a) Calculate the current in the circuit. (b) Calculate the voltage (rms) across the resistor and the capacitor. Is the alebraic sum of these voltages more than the source voltage? If yes resolve the paradox.

A resistor of 100 Omega and a capacitor of 250 muF are connected in series to a 220 V , 50 Hz ac source. Calculate the voltage (rms) across the resistor and the capacitor . Is the algebraic sum of these voltages more than the source voltage ? If yes, resolve the paradox.

Vishva noticed in a dhaba around 50 bulbs, each of 100 W all were glowing. She calculated the cost of electricity consumed in one hour and told the dhaba owner to reduce the expenses and at the same time save electricity by using CFL bulbs instead of ordinary filament-type bulbs. What would be the cost of electric energy if 50 bulbs, each of 100 W. are used for one hour? 1 unit costs Rs 5.

Vishva noticed in a dhaba around 50 bulbs, each of 100 W all were glowing. She calculated the cost of electricity consumed in one hour and told the dhaba owner to reduce the expenses and at the same time save electricity by using CFL bulbs instead of ordinary filament-type bulbs. What is a CFL?

Vishva noticed in a dhaba around 50 bulbs, each of 100 W all were glowing. She calculated the cost of electricity consumed in one hour and told the dhaba owner to reduce the expenses and at the same time save electricity by using CFL bulbs instead of ordinary filament-type bulbs. What value did Vishva display in the above case?

1MW power is to be delivered from a power station to a town 10 km away. One uses a pair of Cu wires of radius 0.5 cm for this purpose. Calculate the fraction of ohmic losses to power transmitted if (a) power is transmitted at 220V. Comment on the feasibility of doing this. (b) a step-up transformer is used to boost the voltage to 11000 V, power transmitted, then a step-down transformer is used to bring voltage to 220 V. (rho_(cu)=1.7xx10^(-8) SI unit )

An electric heater of resistance 8 ohm draws 15A from the service mains for 2 hours. Calculate the rate at which heat is developed in the heater.

An electric heater and an electric bulb are rated 500W. 220V and 100W, 220V respectively. Both are connected in series to a 220V d.c. mains. Calculate the power consumed by (i) the heater ana (ii) electric bulb.