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प्रश्न
Which magnet will you use?
Iron is to be separated from trash.
उत्तर
Electromagnet can be used to separate iron from trash.
संबंधित प्रश्न
What is an electromagnet?
Name two factors on which the strength of magnetic field of an electromagnet depends and state how does it depend on the factors stated by you.
What is an electric motor?
Complete the following sentence :
On reserving the direction of current in a wire, the magnetic field produced by it gets _____.
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?
How does a magnetic field set up by a solenoid change when strength of current in the solenoid is decreased?
State the energy change that takes’place in a D. C. motor.
What is dynomo (a.c. generator)? State the principle on which it works.
A current-carrying solenoid is suspended so as to freely rotate in a horizontal plane. State in what direction will it rest. Give a reason for your answer.
or
When a solenoid that is carrying current is freely suspended, it comes to rest in a particular direction. Why does this happen?
State the function of a split ring in D.C. motor.
