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LAKHMIR SINGH & MANJIT KAUR-Electric Current And its Effects-EXERCISE
- Why do we use iron for making an electromagnet and not steel ?
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- What is an electromagnet ? Explain in your own words, how to make an e...
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- What type of core is used to make an electromagnet?
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- What is meant by the heating effect of current ? Name two appliances w...
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- Explain why, the current that makes the heater element very hot, only ...
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- What is meant by a battery ? How will you arrange two cells to make a ...
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- Name any five electrical appliances in which the heating effect of cur...
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- When the current is switched on through a wire, a compass needle kept ...
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- At the time of short circuit, the current in the circuit :
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- The filament of an electric bulb is made of a thin wire of :
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- The 'element' of an electric iron is made of
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- When electric current is passed through the filament of a bulb, it giv...
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- An electric fuse works on the :
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- The most suitable material for making the core of an electromagnet is ...
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- Circuit Breaker Device which can be used in place of fuse in domestic ...
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- Nichrome wire is used in
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- In a filament-type bulb, a lot of electric energy is wasted in the for...
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- Explain how sound is produced by your school bell ?
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- Which of the following characteristic is not suitable for a fuse wire?
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- An MCB which cuts off the electricity supply in case of short-circuiti...
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