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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 energized, attracting ferromagnetic materials like iron.
संबंधित प्रश्न
State three uses of an electromagnet?
Name the material of core in (a) an electric bell, (b) electromagnet, (c) a d.c. motor, (d) an a.c. generator and (e) a transformer.
A straight current-carrying conductor is kept in a magnetic field. It Experiences a force. State three factors on which the magnitude of force Experienced by the conductor depends. Under what condition will the conductor Experience no force?
State the purpose of the iron core.
How does a magnetic field set up by a solenoid change when number of turns are increased?
State the factors that can increase the speed of rotation of the coil in a D.C. motor.
State the energy change that takes’place in a D. C. motor.
State the principle of a D. C. motor.
State the factors, on which depends the magnitude of the force acting on current carrying conductor, when it is kept in a magnetic field perpendicular to it.
How does a magnetic field set up by a solenoid change when cross-sectional area of solenoid is increased?
