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A current-carrying wire is in form of a square loop of side length $10 cm$ . Current in the wire is $5 A$ . Find out the magnetic field at centre of the loop.

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Important Questions on Magnetic Effect of Current

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Assertion & Reason)>Q 97

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Find out the magnetic field at a point $O$ ?

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Assertion & Reason)>Q 98

250

Turn rectangular coil of length

2.1 cm

and width

1.25 cm

carries a current of

85 µ A

and is subjected to the magnetic field of strength

0.85 T

. Work done for rotating the coil by

180 °

against the torque is:-

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Assertion & Reason)>Q 99

An arrangement of three parallel straight wires placed perpendicular to a plane of paper carrying the same current $I$ along the same direction is shown in the figure. The magnitude of force per unit length on the middle wire $B$ is given by:-

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Assertion & Reason)>Q 100

A long solenoid has

100 turns m^{- 1}

and a current of

3.5 A

is flowing through it. If it is filled with material of relative permeability

(μ_{r} = 20)

, then the magnetic field within the solenoid will be?

(μ_{\circ} = 4 π \times 10^{- 7})

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Assertion & Reason)>Q 101

A rigid circular loop of radius

r

and mass

m

lies in the

x - y

plane on a flat table and has a current

I

flowing in it. At this particular place, the magnetic field is

\vec{B} = B_{x} \hat{i} + B_{y} \hat{j}

. How large must

I

be so that one edge of the loop will lift the front table. Given,

m = 1 kg

r = 1 m

B_{x} = 3 T

and

B_{y} = 4 T

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Assertion & Reason)>Q 102

A straight wire carrying current

10 A

is lying such that position vector at its ends are

{\vec{r}}_{1} = 2 \hat{i} - 2 \hat{j}

and

{\vec{r}}_{2} = 10 \hat{i} + 4 \hat{j}

. It is kept in a uniform magnetic field

1 \hat{k} T

. Then the force acting on wire is:-

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Assertion & Reason)>Q 103

Find the net magnetic field at point $P$ , $(L = 10 cm)$

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Beta Question Bank for Medical: Physics>Chapter 25 - Magnetic Effect of Current>Exercise (Assertion & Reason)>Q 104

The density of iron is

7.8 g {cc}^{- 1}

and induced magnetic field in iron is

1 Tesla

, then find the magnetic dipole moment of each iron atom.

A current-carrying wire is in form of a square loop of side length 10 cm. Current in the wire is 5 A. Find out the magnetic field at centre of the loop.

Important Questions on Magnetic Effect of Current

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A current-carrying wire is in form of a square loop of side length $10 cm$ . Current in the wire is $5 A$ . Find out the magnetic field at centre of the loop.