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प्रश्न
Name the material of an electromagnet?
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उत्तर
Iron bar, insulated copper wire, battery.
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संबंधित प्रश्न
Write true or false for a given statement.
In an electromagnet, the core is made up of copper.
Write true or false for a given statement.
An electric bell uses an electromagnet.
Write true or false for a given statement.
An electromagnet with soft iron core is a temporary magnet.
Fill in the blank
The strength of the magnetic field of an electromagnet is increased by inserting a core of soft ______
Select the correct alternative
An electromagnet is used in
Select the correct alternative
The purpose of armature in an electric bell is
Draw a labelled diagram to make a soft iron bar as an electromagnet. Describe in steps the procedure ?
State two ways by which the strength of the magnetic field of an electromagnet can be increased?
Name a domestic device in which an electromagnet is used ?
Draw a neat and labelled diagram of an electric bell and describe its working ?
