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प्रश्न
The strength of the electromagnet can be increased by
पर्याय
reversing the directions of current
using alternating current of high frequency
increasing the current in the coil
decreasing the number of turns of coil
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उत्तर
The strength of the electromagnet can be increased by increasing the current in the coil
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संबंधित प्रश्न
The incomplete diagram of an electric bell is given in Figure. Draw winding of coil on the core and complete the electric circuit in the diagram.
G-Gong, H-Hammer, A-Armature, C-Core, B-Battery.
Name one device that uses an electromagnet.
Name the material used for preparing an electromagnet.
How is an electromagnet made? Name two factors on which the strength of magnetic field of the electromagnet depends.
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.
Name one device that uses an electromagnet.
Why is soft iron used as the core of the electromagnet in an electric bell?
Explain in detail the application of electromagnets.
Unlike magnetic poles ______ whereas like poles ______.
Explain the working of the following device.
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