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प्रश्न
Which magnet will you use?
Iron is to be separated from trash.
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उत्तर
An electromagnet can be used to separate iron from trash because it can be turned on and off, allowing selective attraction of iron objects. Electromagnets are effective for this purpose, as they create a magnetic field when energised, attracting ferromagnetic materials like iron.
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?
What is an electric motor?
State two factors on which the magnitude of an induced e.m.f. in the secondary coils of a transformer depends.
State two factors on which the strength of induced e. m.f. depends.
State the position of armature coil relative to the direction of magnetic field, in a D. C. motor when the deflecting couple acting an the coil is maximum.
The primary windings of a step-up transformer are usually made of thicker wire than the secondary. Explain.
State important properties (or characteristics) of magnetic lines of force around a straight conductor.
State and explain Maxwell’s Cork Screw Rule.
How does a magnetic field set up by a solenoid change when cross-sectional area of solenoid is increased?
