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JEE Main
IMPORTANT
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A variable current flows through a 1 Ω resistor for 2 s. Time dependence of the current is shown in the graph.

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Important Questions on Heating Effects of Current

EASY
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 7 - Heating Effects of Current>DPP>Q 1

Which of the following plots may represent the thermal energy produced in a resistor in a given time as a function of the electric current?

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EASY
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 7 - Heating Effects of Current>DPP>Q 2
Two heating coils, one of fine wire and the other of thick wire of the same material and of the same length are connected in series and in parallel. Which of the following statement is correct?
MEDIUM
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 7 - Heating Effects of Current>DPP>Q 3
A resistor R1 dissipates the power P when connected to a certain generator. If the resistor R2 is put in series with R1 the power dissipated by R1,
MEDIUM
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 7 - Heating Effects of Current>DPP>Q 4
If two bulbs of wattage 25 W and 100 W respectively each rated at 220 V are connected in series with the supply of 440 V, then which bulbs will fuse?
EASY
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 7 - Heating Effects of Current>DPP>Q 5
A 100 W bulb working on 200 V and a 200 W bulb working on 100 V have,
EASY
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 7 - Heating Effects of Current>DPP>Q 6
There are two electric bulbs of 40 W and 100 W. Which one will be brighter when first connected in series and then in parallel?
EASY
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 7 - Heating Effects of Current>DPP>Q 7
Two bulbs of 500 W and 200 W are manufactured to operate on 220 V line. The ratio of heat produced in 500 W and 200 W, in two cases, when first they are joined in parallel and second in series, will be:
MEDIUM
JEE Main
IMPORTANT
Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 7 - Heating Effects of Current>DPP>Q 8

Two wires A and B of the same material have their lengths in the ratio 1:2 and radii in the ratio 2:1. The two wires are connected in parallel across a battery. The ratio of the heat produced in A to the heat produced in B for the same time is