Joule's Heating- MCQ-Basic

Dear Readers,

Physics is an important subject in preparation for various Competitive exams. To keep a track of your preparation we have designed a small quiz of 10 Basic Level Questions on Joule's Heating.You have 10 minutes to solve the quiz, click the start timer button in order to start the timer and then click on submit button at the end to submit the quiz and view your scores and correct answers.

Q1. A 220 V, 1000 W bulb is connected across a 110 V mains supply. The power consumed will be

•  1000 W
•  750 W
•  500 W
•  250 W

250 W

Q2. An electric bulb is rated 60W, 220V. The resistance of its filament is

•  708 Î©
•  870 Î©
•  807 Î©
•  780 Î©

807 Î©

Q3. An electric bulb marked 40W and 200V, is used in a circuit of supply voltage 100V. Now its power is

•  100 W
•  40 W
•  20 W
•  10 W

10 W

Q4. Two wires have resistance of 2Î© and 4Î© connected to same voltage, ratio of heat dissipated at resistance is

•  1 : 2
•  4 : 3
•  2 : 1
•  5 : 2

2 : 1

Q5. Three bulbs of 40W, 60W and 100W are arranged in series with 220V. Which bulb has minimum resistance

•  40 W
•  60 W
•  100 W
•  Equal in all bulbs

100 W

Q6. If two electric bulbs have 40W and 60W rating at 220 V, then the ratio of their resistances will be

•  3 : 2
•  2 : 3
•  3 : 4
•  4 : 3

3 : 2

Q7. Two wires A and B of same material and mass have their lengths in the ratio 1 : 2. On connecting them to the same source, the rate of heat dissipation in B is found to be 5W. The rate of heat dissipation in A is

•  10 W
•  5 W
•  20 W
•  None of these

10 W

Q8. If 2.2 KW power is transmitted through a 10 ohm line at 22000 V, the power lost in the form of heat will be

•  0.1 W
•  1 W
•  10 W
•  100 W

0.1 W

Q9. The ratio of diameters of two similar copper wires of equal length is 1 : 2. A constant current is passed through them when connected in series. The ratio of heat produced in the two will be

•  1 : 2
•  1 : 3
•  4 : 1
•  1 : 5

4 : 1

Q10. A constant voltage is applied between the two ends of a uniform metallic wire. Some heat is developed in it. If both length and radius of the wire are halved then the heat developed in the same duration will become

•  Half
•  Twice
•  One-fourth
•  Same

Half

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