A uniform magnetic field of 3000 gauss is established along the positive Z-axis. A rectangular loop of size 10 cm × 5 cm carries a current of 12 A . What is the magnitude and direction of the torque on the loop in the four cases shown in the figure?

(a) τ = τ max = INAB , because θ = 90 ° = 12 × 50 × 10 - 4 × 0 . 3 = 0 . 018 Nm along - Y direction. (b) τ = τ max = INAB [ because θ = 90 ° ] Ans. Here also, τ = 0 . 018 along - Y direction. (c) Here, τ = τ max = INAB [ because θ = 90 ° ] Ans. τ = 0 . 018 along - X direction. (d) τ = 0 because m → ∥ B → so, θ = 0 ° . τ = 0 .

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12th ICSE

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When a coil of magnetic moment $2.5 \times 10^{- 8} {JT}^{- 1}$ is placed with its face parallel to a uniform magnetic field, it experiences a torque of $7.5 \times 10^{- 9} J .$ Find the magnitude of the field.

Important Questions on Torque on a Current-Loop : Moving-Coil Galvanometer

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12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 2

A square coil of side

10 cm

consists of

20

turns and carries a current of

12 A .

It is suspended vertically in a uniform horizontal magnetic field of

0.80 T,

such that the normal to the plane of the coil makes an angle of

30 °

with the field direction. Find the magnitude of the torque experienced by the coil.

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12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 3

A rectangular loop of area

5 m^{2}

, has

50

turns and carries a current of

1 A

. It is held in a uniform magnetic field of

0.1 T

, at an angle of

30 °

.Calculate the torque experienced by the coil in SI unit.

MEDIUM

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 4

A circular coil of radius

6.0 cm

and

25

turns carries a current of

10 A

. It is suspended vertically in a uniform magnetic field of

1.2 T

and the field lines are horizontal in the plane of the coil. Compute the torque acting on the coil.

HARD

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 5

A rectangular coil of sides

8.0 cm

and

6.0 cm

having

2000

turns and carrying a current of

0.20 A

is suspended in a uniform magnetic field of

0.20 T

directed along the positive X-axis. What is the net force on the coil?

MEDIUM

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 5

A rectangular coil of sides

8.0 c m

and

6.0 c m

having

2000

turns and carrying a current of

0.20 A

is suspended in a uniform magnetic field of

0.20 T

directed along the positive X-axis. What is the maximum torque the coil can experience and in which orientation?

MEDIUM

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 5

A rectangular coil of sides

8.0 cm

and

6.0 cm

having

2000

turns and carrying a current of

0.20 A

is suspended in a uniform magnetic field of

0.20 T

directed along the positive X-axis, For which orientation of the coil the torque is zero? When is this equilibrium stable and when is it unstable?

HARD

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 6

A coil of area

5 {cm}^{2}

and having

100

turns is placed in a uniform magnetic field of

1.5 T .

When a current of

0.2 A

is passed through the coil, find the magnetic dipole moment of the coil and the maximum torque produced.

HARD

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 8 - Torque on a Current-Loop : Moving-Coil Galvanometer>QUESTIONS>Q 7

A uniform magnetic field of $3000$ gauss is established along the positive Z-axis. A rectangular loop of size $10 cm \times 5 cm$ carries a current of $12 A .$ What is the magnitude and direction of the torque on the loop in the four cases shown in the figure?

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When a coil of magnetic moment 2.5×10-8JT-1 is placed with its face parallel to a uniform magnetic field, it experiences a torque of 7.5×10-9J. Find the magnitude of the field.

Important Questions on Torque on a Current-Loop : Moving-Coil Galvanometer

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When a coil of magnetic moment $2.5 \times 10^{- 8} {JT}^{- 1}$ is placed with its face parallel to a uniform magnetic field, it experiences a torque of $7.5 \times 10^{- 9} J .$ Find the magnitude of the field.