CameraIcon

SearchIcon

MyQuestionIcon

32

You visited us 32 times! Enjoying our articles? Unlock Full Access!

Electric Power

An electric i...

Question

An electric immersion heater with a resistance of 40 ohms is connected to a 240 V power supply. Calculate the current flowing through the heater and the amount of heat energy produced by the heater in 30 minutes.

Open in App

Solution

An electric immersion heater with a resistance of 40 ohms is connected to a 240 V power supply. $H e a t = \frac{V^{2} * t}{R} = \frac{240^{2} * 30 m i n}{40 * 60} = 720 J / h$

Suggest Corrections

thumbs-up

0

Similar questions

Q. An electric heater of resistance

100 Ω

is connected to a main supply for 20 minutes. If 2A current flows through the filament of the heater, calculate the heat energy produced in the heater.

Q. An electric heater of power

1000

watt is joined to electric mains of

250

volt. Calculate:
(i) Electric current flowing through heater
(ii) Resistance of heater wire
(iii) Thermal energy produced per minute by heater
(iv) The electric energy spent in Kilowatt-hour by heater in

2

Q. An electric heater is connected to

120 V

supply. A current of

6 A

flows through the heater. How much is the resistance across the heater? How much current would flow if the same heater is connected to

220 V

Q. An electric heater consumes

4.4 k W

power when connected with a

220 V

line voltage then,
(i) Calculate the current passing through the heater.
(ii) Calculate the resistance of a heater.
(iii) Calculate the energy consumed in

2

Q. An electric immersion heater is switched on for 8 minutes. The heat supplied by it raises the temperature of 500 g of water from

10^{o} C t o 60^{o} C

. Calculate the power of the heater in watts.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Electric Power

PHYSICS

Watch in App

explore_more_icon

Explore more

Standard VIII Physics

Join BYJU'S Learning Program

CrossIcon