What is the maximum torque on a rectangular coil of area 5 cm × 12 cm of 600 turns, when carrying a current of 10 - 5 A in a magnetic field of 0 . 10 T ?

Given: The area of rectangular coil, A = 5 cm × 12 cm = 60 × 10 - 4 m 2 Number of turns in coil, N = 600 Current in coil, I = 10 - 5 A The magnetic field intensity, B = 0 . 10 T The maximum torque will be when the magnetic field and the area vector are perpendicular. τ m a x = N I B A sin 90 ° = 600 × 10 - 5 × 0 .10 × 60 × 10 - 4 = 3 .6 × 10 - 6 N m

What is the maximum torque on a rectangular coil of area 5 cm × 12 cm of 600 turns, when carrying a current of 10 - 5 A in a magnetic field of 0 . 10 T ?

Given: The area of rectangular coil, A = 5 cm × 12 cm = 60 × 10 - 4 m 2 Number of turns in coil, N = 600 Current in coil, I = 10 - 5 A The magnetic field intensity, B = 0 . 10 T The maximum torque will be when the magnetic field and the area vector are perpendicular. τ m a x = N I B A sin 90 ° = 600 × 10 - 5 × 0 .10 × 60 × 10 - 4 = 3 .6 × 10 - 6 N m

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What is the maximum torque on a rectangular coil of area $5 cm \times 12 cm$ of $600$ turns, when carrying a current of $10^{- 5} A$ in a magnetic field of $0.10 T$ ?

Important Questions on Magnetic Effect of Current

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12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Problems For Practice>Q 2

What torque acts on a

40

turn coil of

100 {cm}^{2}

area carrying a current of

10 A

held with its axis at right angles to a uniform magnetic of

0.2 T

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Problems For Practice>Q 3

A square shaped plane coil of area

100 {cm}^{2}

200

turns carries a steady current of

5 A

. It is placed in a uniform magnetic field of

0.2 T

acting perpendicular to the plane of the coil. Calculate the torque on the coil when its plane makes an angle of

60 °

with the direction of the field. In which orientation will the coil be in stable equilibrium?

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12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Problems For Practice>Q 4

A rectangular coil $P Q R S$ is placed in a uniform magnetic field $\vec{B}$ , as shown in Figure. Find the torque on the coil when it carries a current of $2.0 A$ . The magnitude of the field $\vec{B}$ is $2.0 \times 10^{- 2} T$ .

Question Image

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12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Problems For Practice>Q 5

A rectangular coil of

100

turns have length

5 cm

and width

4 cm

. It is placed with its plane parallel to a uniform magnetic field and a current of

2 A

is passed through the coil. If the torque acting on the coil is

0.2 N m

, find the magnitude of the magnetic field.

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Problems For Practice>Q 6

A circular coil of radius

2.0 cm

has

500

turns and carries a current of

1.0 A

. Its axis makes an angle of

30 °

with the uniform magnetic field of

0.40 T

that exists in the space. Find the torque acting on the coil.

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Problems For Practice>Q 7

A circular coil of

200

200 turns and radius

10 cm

is placed in a uniform magnetic field of

0.5 T

, normal to the plane of the coil. If the current in the coil is

3.0 A

, calculate the (a) total torque on the coil. (b) total force on the coil. (c) average force on each electron in the coil, due to the magnetic field. Assume the area of cross‐section of the wire to be

10^{- 5} m^{2}

and the free electron density is

10^{29} / m^{3}

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Problems For Practice>Q 1

A rectangular coil of area

100 {cm}^{2}

and consisting of

100

turns is suspended in a magnetic field of

5 \times 10^{- 2} T

. What current should be made to pass through it in order to keep equilibrium at an angle of

45 °

with the field? Given that torsion constant of the suspension fibre is

10^{- 8} N m \deg^{- 1}

EASY

12th CBSE

IMPORTANT

New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Problems For Practice>Q 2

The coil of a galvanometer consists of

250

turns of fine wire wound on a

2.0 cm \times 1.0 cm

rectangular frame. It is suspended in a uniform radial magnetic field of strength

2, 000 G

. A current of

10^{- 4} A

produces an angular deflection of

30 °

in the coil. Find the torsional constant of its suspension.

What is the maximum torque on a rectangular coil of area 5 cm×12 cm of 600 turns, when carrying a current of 10-5 A in a magnetic field of 0.10 T?

Important Questions on Magnetic Effect of Current

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What is the maximum torque on a rectangular coil of area $5 cm \times 12 cm$ of $600$ turns, when carrying a current of $10^{- 5} A$ in a magnetic field of $0.10 T$ ?