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प्रश्न
What do you understand by the term "electromagnetic induction"? Explain with the help of a diagram.
उत्तर
In case of relative motion between a source of magnetic field and conductor, current flows inside the conductor. This phenomenon is called electromagnetic induction. For example, when a bar magnet is moved towards a coil of wire attached to a galvanometer, a deflection in galvanometer needle is observed due to induced current as shown in the figure.
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संबंधित प्रश्न
State Fleming’s right-hand rule.
An induced current is produced when a magnet is moved into a coil. The magnitude of induced current does not depend on:
(a) the speed with which the magnet is moved
(b) the number of turns of the coil
(c) the resistivity of the wire of the coil
(d) the strength of the magnet
Name and state the law which determines the direction of induced current.
or
State Fleming’s right-hand rule.
Draw a labelled diagram to show how an electromagnet is made.
Fleming's left hand rule : electric current : : Fleming's right hand rule : _______
A straight metal wire crosses a magnetic field of flux 4 mWb in a time 0.4 s. Find the magnitude of the emf induced in the wire.
Using Lenz’s law, predict the direction of induced current in conducting rings 1 and 2 when the current in the wire is steadily decreasing.
The instrument that use to defect electric current in the circuit is known as ____________.
Which of the following instruments works by electromagnetic induction?
