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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
State two ways of magnetising an iron piece?
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.
Name the type of transformer shown in fig . What changes will you observe regarding the brightness of the lamp, if
(a) The no. of turns in the secondary is doubled?
(b) The part X of the transformer is removed?
( c) The core of the transformer is made out of copper?
(d ) The A.C. supply is replaced by D.C.?
State two factors on which the magnitude of an induced e.m.f. in the secondary coils of a transformer depends.
Describe briefly one way of producing an induced current in a coil. State one factor that determines the magnitude of induced e.m.f.
State the two properties of the magnetic lines of force around a circular coil.
Describe a simple Experiment to demonstrate that there Exists a magnetic field around a current-carrying conductor.
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.
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.
