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प्रश्न
An electric bell has an electromagnet.
विकल्प
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
Will the compass needle show deflection when the switch in the circuit shown by figure is closed?
Describe some experiment to show that the magnetic field is associated with an electric current.
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?
Observe the following diagram and choose the correct alternative:
(c) Considering the relationship in the first pair, complete the second paie :
AgCI : White :: CuI2 : ___________
(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.
Name any two appliances which works on the phenomenon of magnetic effect of electric current.
Draw a neat labelled diagram to show the magnetic effect of electric current.
Explain the magnetic field created by a current around a conductor from the figure.
