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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.
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 ______
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?
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 ?
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.
