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प्रश्न
Answer the following in short.
Name a few common appliances that use electromagnets.
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उत्तर
Electric bells, electric motor, telephones, loudspeakers, and generators are few common appliances that use electromagnets.
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संबंधित प्रश्न
Show with the aid of a diagram how a wire is wound on a U-shaped piece of soft iron in order to make it an electromagnet. Complete the circuit diagram and label the poles of the electromagnet.
State three uses of an electromagnet?
State the two properties of the magnetic lines of force around a circular coil.
State the purpose of the iron core.
How does a magnetic field set up by a solenoid change when strength of current in the solenoid is decreased?
What is a permanent magnet? Give one use of it.
State the position of armature coil relative to the direction of magnetic field, in a D. C. motor when the deflecting couple acting and the coil is minimum.
The primary windings of a step-up transformer are usually made of thicker wire than the secondary. Explain.
State and explain Maxwell’s Cork Screw Rule.
Which magnet will you use?
Iron is to be separated from trash.
