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प्रश्न
Fill in the blanks by writing (i) Only soft iron, (ii) Only steel, (iii) Both soft-iron and steel for the material of core and/or magnet.
Electromagnet ______.
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उत्तर
Electromagnet core- soft iron
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संबंधित प्रश्न
State two ways of magnetising an iron piece?
State two differences between an electromagnet and a permanent magnet.
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.?
What is an electromagnet?
Describe a simple Experiment to demonstrate that there Exists a magnetic field around a current-carrying conductor.
What energy conversion takes place during the working of a d c motor?
State the factors that can increase the speed of rotation of the coil in a D.C. motor.
The primary windings of a step-up transformer are usually made of thicker wire than the secondary. Explain.
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.
Write the answer in your word.
How is an electromagnet made?
