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प्रश्न
When an electric current is passed through a wire or a coil, a magnetic field is produced. Is the reverse phenomenon possible i.e, can a magnetic field produce an electric current? Explain with the help of an appropriate example.
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उत्तर
Yes, the reserve phenomenon is possible.
Example: A changing magnetic field in one conductor causes induced current in another. This is sometimes referred to as electromagnetic induction.
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संबंधित प्रश्न
What is electromagnetic induction?
Name two devices in which electromagnets are used and two devices where permanent magnets are used.
In which of the following case does the electromagnetic induction occur?
A loop of wire is held near a magnet.
A conducting rod is moved with a constant velocity v in a magnetic field. A potential difference appears across the two ends _____________ .
Draw a simple labeled diagram of a step-up transformer.
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.
A. C. generator______.
A coil has a self-inductance of 0·05 Henry. Find the magnitude of the emf induced in it when the current flowing through it is changing at the rate of 100 As-1.
For making a strong electromagnet the material of the core should be ______.
One solenoid is centered inside another. The outer one has a length of 50.0 cm and contains 6750 coils, while the coaxial inner solenoid is 3.0 cm long and π cm2 in area and contains 150 coils. The current in the outer solenoid is changing at 3000 A/s. The emf induced in the inner solenoid is ______ V.
(Round off to two decimal places.)
Which group consists entirely of technologies that work on electromagnetic induction?
