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Solenoid

The magnetic ...

Question

The magnetic field lines at the axis of the current-carrying solenoid are

A

circles with centers on the axis of the solenoid

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B

spirals about the axis of the solenoid

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C

parallel to the axis of the solenoid

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D

perpendicular to the axis of the solenoid

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Solution

The correct option is C
parallel to the axis of the solenoid

The magnetic field produced by a current-carrying solenoid is similar to the magnetic field produced by a bar magnet. They are straight lines parallel to the axis of the solenoid going from south pole to north pole inside the solenoid and from north pole to south pole outside the solenoid.

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Similar questions

Q. The magnetic field lines in the middle of the current-carrying solenoid are?

(a) circles
(b) spirals
(c) parallel to the axis of the tube
(d) perpendicular to the axis of the tube

Q. Direction of magnetic field inside a solenoid is along the axis of solenoid.

Q. A tightly-wound, long solenoid is kept with its axis parallel to a large metal sheet carrying a surface current. The surface current through a width dl of the sheet is Kdl and the number of turns per unit length of the solenoid is n. The magnetic field near the centre of the solenoid is found to be zero. (a) Find the current in the solenoid. (b) If the solenoid is rotated to make its axis perpendicular to the metal sheet, what would be the magnitude of the magnetic field near its centre?

Q. A wire of lenght

5 c m

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30

with the axis of solenoid, The wire carries a current of 5A and the magnetic field due to solenoid is

2.5 \times 10^{- 2}

T. Magnetic force on wire is

Q. The current in an ideal, long solenoid is varied at a uniform rate of 0.01 As⁻¹. The solenoid has 2000 turns/m and its radius is 6.0 cm. (a) Consider a circle of radius 1.0 cm inside the solenoid with its axis coinciding with the axis of the solenoid. Write the change in the magnetic flux through this circle in 2.0 seconds. (b) Find the electric field induced at a point on the circumference of the circle. (c) Find the electric field induced at a point outside the solenoid at a distance 8.0 cm from its axis.

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