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Electromagnetism and Electromagnet

magnetic indu...

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magnetic induction at centre point of axis of long solenoid is B. if length of solenoid is reduced to half and same wire is wound over it in 2 layers then new magnetic induction i

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Q. The length of the solenoid is

0.1 m

and its diameter is very small. A wire is wound over it in two layers. The number of turns in inner layer is

50

and that in outer layer is

40

. The strength of current flowing in two layers in opposite direction is

3 A

. Then the magnetic induction at the middle of solenoid is:

Q. A very long solenoid has

800

turns per metre length of the solenoid. A current of

1.6 A

flows through it. Then the magnetic induction at the middle point of the solenoid on its axis is approximately.

3.142 m

5.0 c m

in diameter has two layers of windings of

500

turns each and carries a current of

5 A

. Calculate the magnetic induction at its centre along the axis.

Q. A solenoid has

1000

20 cm

long. Find the magnetic induction produced at the centre of the solenoid by the current of

2 A

.

Q. A solenoid has

100

turns/meter and is carrying a current of

.4 A

. The radius of coil is

8 c m

. The magnitude of magnetic induction at a point

50 c m

on the axis from centre of solenoid is

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