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Standard X
Physics
Electromagnetic Induction
Electromagnet...
Question

Electromagnetic induction means ......... .

A
charging of an electric conductor.
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B
production of magnetic field due to a current flowing through a coil.
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C
generation of a current in a coil due to relative motion between the coil and the magnet.
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D
motion of the coil around the axle in an electric motor.
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Solution

The correct option is A generation of a current in a coil due to relative motion between the coil and the magnet.
The process of producing induced current in a closed circuit or in a coil by changing the magnetic field (i.e. relative motion between the coil and magnet) linked with the coil is known as electromagnetic induction. ... This process of producing induction current is known as electromagnetic induction.

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Q. Electromagnetic induction means-
a. Charging of an electric conductor.
b. Production of magnetic field due to a current flowing through a coil.
c. Generation of a current in a coil due to relative motion between the coil and the magnet.
d. Motion of the coil around the axle in an electric motor.
Q.

The phenomenon of electromagnetic induction is

(a) the process of charging a body

(b) the process of generating magnetic field due to a current passing through a coil

(c) producing induced current in a coil due to relative motion between a magnet and the coil

(d) the process of rotating a coil of an electric motor

Q. Question 2
The phenomenon of electromagnetic induction is
(a) the process of charging a body.
(b) the process of generating magnetic field due to a current passing through a coil.
(c) producing induced current in a coil due to relative motion between a magnet and the coil.
(d) the process of rotating a coil of an electric motor.
Q. The electric current in a circular coil of two turns produced a magnetic induction of 0.2T at its centre. The coil is unwound and is rewound into a circular coil of four turns. The magnetic induction at the centre of the coil now is, in T :
(if same current flows in the coil)
Q. A circular coil of radius R carries an electric current. The magnetic field due to the coil at a point on the axis of the coil located at distance x(x>>>R) is measured. If the current in coil is halved and distance of the point at axis is doubled, the new magnetic field will be:
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