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प्रश्न
State two ways by which the strength of magnetic field of an electromagnet can be increased ?
उत्तर
The magnetic field of the electromagnet can be increase in the following two ways :
- By inserting a rod of soft iron or steel inside the cylindrical tube. This rod is called the core.
- By increasing the total number of turns of the coil.
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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.
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
What is an electromagnet?
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.
