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

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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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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 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,

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 35

Two similar coils of radius

R

and number of turns

N

are lying concentrically with their planes at right angles to each. other. The currents flowing in them are $I$ and

I \sqrt{3}

respectively. The resultant maqnetic induction at the centre will be (in

W b / m^{2}

).

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 36

Two similar coils are kept mutually perpendicular such that their centres coincide. At the centre, find the ratio of the magnetic field due to one coil and the resultant magnetic field by both coils, if the same current is flown.

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 37

A coil of one turn is made of a wire of certain length and then from the same length a coil of two turns is made. If the same current is passed in both the cases, then the ratio of the magnetic inductions at their centres will be

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 38

Magnetic field due to

0.1 A

current flowing through a circular coil of radius

0.1 m

and

1000

turns at the centre of the coil is

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 39

Magnetic field due to a ring having

n

turns at a distance

x

on its axis is proportional to (if

r =

radius of ring)

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Alpha Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise-1>Q 40

A circular arc of wire subtends an angle

\frac{π}{2}

at the centre. If it carries a current

I

and its radius of curvature is

R,

then the magnetic field at the centre of the arc is