Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 24

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Two long parallel wires are at a distance $2 d$ apart. They carry steady equal currents flowing out of the plane of the paper, as shown. The variation of the magnetic field $B$ along the $X X'$ is given by

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Important Questions on Magnetic Effect of Current

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 26

A current

i Ampere

flows along an infinitely long straight thin walled tube, then the magnetic induction at any point inside the tube is :

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 27

A long straight wire of radius

' a'

carries a steady current

I

. The current is uniformly distributed across its cross-section. The ratio of the magnetic field at

\frac{a}{2}

and

2 a

is

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 28

A current $I$ flows along the length of an infinitely long, straight and thin-walled pipe. Then

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 29

Two identical conducting wires

AOB

and

COD

are placed at right angles to each other. The wire

AOB

carries an electric current

I_{1}

and

COD

carries a current

I_{2}

. The magnetic field on a point lying at a distance

d

from

O

, in a direction perpendicular to the plane of the wires

AOB

and

COD,

will be given by

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 30

An electric current

i

is flowing in a circular coil of radius

a

. At what distant from the centre on the axis of the coil will the magnetic field be

{(\frac{1}{8})}^{th}

of its value at the centre.

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 32

A wire loop $P Q R S P$ is constructed by joining two semi-circular coils of radii $r_{1}$ and $r_{2}$ , respectively, as shown in the figure. Current $i$ is flowing in the loop. The magnetic induction at point $O$ will be

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 33

The magnetic field on the axis of a current carrying circular coil of radius

a

at a distance

2 a

from its. centre will be

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 34

The use of Helmholtz coils is to produce,