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प्रश्न
Complete the following sentence :
On reserving the direction of current in a wire, the magnetic field produced by it gets _____.
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उत्तर
On reserving the direction of current in a wire, the magnetic field produced by it gets reversed.
संबंधित प्रश्न
Tick the most appropriate answer.
Which of the following methods is used to magnetize a magnetic without touching it by a magnet?
principle of an electric motor ?
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.
Electric bell ______.
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State two advantages of an electromagnet over a bar magnet.
State the principle of a D. C. motor.
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.
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(ii) Name the law which helped you to find the direction of the magnetic field lines.
Which magnet will you use?
Iron is to be separated from trash.
