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What is the force experienced by a semicircular wire, of radius $R$ when it is carrying a current $I$ and is placed in a uniform magnetic field of induction $B$ as shown in figure?

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Important Questions on Moving Charges and Magnetism

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Gamma Question Bank for Engineering Physics>Chapter 18 - Moving Charges and Magnetism>Assignment>Q 27

Variation of magnetic field at the centre of an arc

(B)

with the angle subtended by the arc at the centre

(θ)

can be best represented by
(Given

\frac{I}{Rθ} =

constant, where

I =

current in the arc and

R =

radius of arc)

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Gamma Question Bank for Engineering Physics>Chapter 18 - Moving Charges and Magnetism>Assignment>Q 35

A charged particle of mass

m

is moving with a speed

u

in a circle of radius

r

. If the magnetic field induction at the centre is

B

, the charge on the particle is

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Gamma Question Bank for Engineering Physics>Chapter 18 - Moving Charges and Magnetism>Assignment>Q 38

Due to the flow of current in a circular loop of radius

R

, the magnetic induction produced at the centre of the loop is

B

. The magnetic moment of the loop is

(μ_{0} =

permeability constant)

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Gamma Question Bank for Engineering Physics>Chapter 18 - Moving Charges and Magnetism>Assignment>Q 39

A rectangular coil

20 cm \times 20 cm

has

100 turns

and carries a current of

1 A

. It is placed in a uniform magnetic field

B = 0.5 T

with the direction of magnetic field parallel to the plane of the coil. The magnitude of the torque required to hold this coil in this position is

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Gamma Question Bank for Engineering Physics>Chapter 18 - Moving Charges and Magnetism>Assignment>Q 40

A length

I

of a wire is bent to form a circular coil of some turns. A current

i

is then established in the coil and it is placed in a uniform magnetic field

B

. The maximum torque that acts on the coil is

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Gamma Question Bank for Engineering Physics>Chapter 18 - Moving Charges and Magnetism>Assignment>Q 41

A ring carrying current $I$ lies in $x - z$ plane as shown. A short magnetic dipole with dipole moment directed along $x$ -axis is fixed at origin. If the ring is free to move anywhere, then it will

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Gamma Question Bank for Engineering Physics>Chapter 18 - Moving Charges and Magnetism>Assignment>Q 42

Two galvanometers

A

and

B

require

3 mA

and

5 mA

respectively to produce the same deflection of

10

division then

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Gamma Question Bank for Engineering Physics>Chapter 18 - Moving Charges and Magnetism>Assignment>Q 43

Sensitivity of a moving coil galvanometer can be increased by:

What is the force experienced by a semicircular wire, of radius R when it is carrying a current I and is placed in a uniform magnetic field of induction B as shown in figure?

Important Questions on Moving Charges and Magnetism

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What is the force experienced by a semicircular wire, of radius $R$ when it is carrying a current $I$ and is placed in a uniform magnetic field of induction $B$ as shown in figure?