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प्रश्न
Write true or false for a given statement.
An electromagnet with soft iron core is a temporary magnet.
विकल्प
True
False
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उत्तर
True
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संबंधित प्रश्न
Write true or false for a given statement.
In an electromagnet, the core is made up of copper.
Select the correct alternative
Electromagnets are made up of
Select the correct alternative
An electromagnet is used in
Select the correct alternative
The purpose of armature in an electric bell is
Name the material of an electromagnet?
Name two factors on which the strength of magnetic field of an electromagnet depends ?
State two ways by which the strength of the magnetic field of an electromagnet can be increased?
State two common uses of electromagnets ?
The incomplete diagram of an electric bell is given in fig. Complete the diagram and label its different parts ?
Describe the construction and working of an electric bell with the help of a diagram.
