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प्रश्न
An electric bell has an electromagnet.
पर्याय
True
False
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उत्तर
This statement is True.
Explanation:
An electric bell has a piece of iron wound by a coil. When current passes through this coil, it behaves as an electromagnet.
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संबंधित प्रश्न
Fill in the following blank with suitable words:
If a coil is viewed from one end and the current flows in an anticlockwise direction, then this end is a ........... pole.
For the coil in the diagram below, when the switch is pressed:
(a) what is the polarity of end A?
(b) which way will the compass point then?
A coil is connected to a galvanometer. When the N-pole of magnet is pushed into the coil, the galvanometer deflected to the right. What deflection, if any, is observed when:
the S-pole is inserted?
(b) State whether the following statements are true or false:
(i) Magnetic poles exist in pairs.
(ii) Global warming is a desirable aspect of the intensified greenhouse effect.
A magnetic compass shows a deflection when placed near a current carrying wire. How will the deflection of the compass get affected if the current in the wire is increased? Support your answer with a reason.
Magnetic effect of current was discovered by ______.
Boojho made an electromagnet by winding 50 turns of wire over an iron screw. Paheli also made an electromagnet by winding 100 turns over a similar iron screw. Which electromagnet will attract more pins? Give reason.
How does the magnetic effect of electric current help in the working of an electric bell? Explain with the help of a diagram.
What do you mean by the magnetic effect?
Define the magnetic effect of electric current.
