MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Heating Effect of Current

If the curren...

Question

If the current passing through a heater is halved, then the heat produced by it becomes

A

2H

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

4H

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

H/2

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

H/4

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D. H/4
We know that,
H = I² R t,
If I_new = I/2, then

H_new = (I/2)² R t

H_new = (1/4) I² R t = H/4.

Suggest Corrections

thumbs-up

19

Similar questions

Q. If the current flowing through a fixed resistor is halved, the heat produced in it will become:

(a) double
(b) one-half
(c) one-fourth
(d) four times

Q. An electrical heater is run by a household power supply. If resistance is halved, heat produced is:

Q. (a) Derive the expression for the heat produced due to a current 'I' flowing for a time interval 't' through a resistor 'R' having a potential difference 'V' across its ends. With which name is this relation known?
(b) How much heat will an instrument of 12 W produce in one minute if it is connected to a battery of 12 V?
(c) The current passing through a room heater has been halved. What will happen to the heat produced by it?
(d) What is meant by the heating effect of current? Give two applications of the heating effect of current.
(e) Name the material which is used for making the filaments of an electric bulb.

Q. If the current passing through an electric bell is doubled, the heat produced will become

240

volts in an electric heater,

2 A

current passes through it. Find the current passed in the heater if

120

volts is passed; and also calculate the resistance of the coil of heater.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Heating Effect of Current

PHYSICS

Watch in App

explore_more_icon

Explore more

Heating Effect of Current

Standard X Physics

Join BYJU'S Learning Program

CrossIcon