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Class 7
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Physics
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Electric Current and its Effects
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Heating Effect of Electric Current
Heating Effect of Electric Current
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Basics of Heating Effect of Electric Current
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Application of Heating Effect of Current
5 mins
Electric Fuse & MCB
7 mins
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Application of Heating Effect of Electrical Current
3 mins
Heating Effect Of Electric Current
3 mins
Important Questions
State difference between the wire used in the element of an electric heater and in a fuse wire.
Medium
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Name two electric devices for each where
(i) heating effect of current is used and
(ii) magnetic effect of current is used.
Medium
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What is/are the advantage of MCB over fuses?
This question has multiple correct options
Easy
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Why are compact fluorescent lamps (CFLs) preferred over electric bulbs?
Medium
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Write the function of a fuse.
Medium
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Which of the following equipment does not work on principle of Joule's law?
Easy
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Name the device used these days in place of electric fuses in electrical circuits.
Medium
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Why is a fuse wire made of a tin-lead alloy and not copper?
Medium
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State four most common electrical appliances based on heating effect of electric current. Why do we use finely heated platinum wire in surgery?
Medium
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What happens on connecting too many appliances at a time to a single socket?
Medium
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