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प्रश्न
What is an electromagnet?
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उत्तर
An electromagnet — An electromagnet is a temporary magnet which behaves as a magnet when electric current is passed through the insulated copper wire and loses its magnetism when current is stopped. It has a soft iron piece called the core with an insulated copper wire wound on it.
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संबंधित प्रश्न
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
Name the material of an electromagnet?
You are given a U shaped soft iron piece, insulated copper wire and a battery. Draw a circuit diagram to make a horse shoe electromagnet ?
Name two factors on which the strength of magnetic field of an electromagnet depends ?
State two ways by which the strength of magnetic field of an electromagnet can be increased ?
State two common uses of electromagnets ?
Name a domestic device in which an electromagnet is used ?
Draw a neat and labelled diagram of an electric bell and describe its working ?
Describe the construction and working of an electric bell with the help of a diagram.
