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प्रश्न
Name two factors on which the strength of magnetic field of an electromagnet depends ?
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उत्तर
The magnetic field of an electromagnet (I or U-shaped) can be increased by the following two ways :
- By increasing the number of turns of winding in the solenoid.
- By increasing the current through the solenoid.
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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 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
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 a domestic device in which an electromagnet is used ?
The incomplete diagram of an electric bell is given in fig. Complete the diagram and label its different parts ?
The following diagram shows four circuits A, B, C and D. Each circuit has a cell and a torch bulb. Name the circuits in which the bulb will glow? Give reason to your answer.
