Physics · JEE

Force on a current-carrying conductor in a uniform magnetic field Mock Test for JEE

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Syllabus context

Part of Magnetic Effects of Current and Magnetism in JEE Main Physics.

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Q1PhysicsUnit 13: Magnetic Effects of Current and Magnetism

A rectangular loop carrying a current is situated near a long straight wire such that the wire is parallel to the one of the sides of the loop and is in the plane of the loop. If a steady current lis established in wire as shown in the figure, the loop will

Q2PhysicsUnit 13: Magnetic Effects of Current and Magnetism

The horizontal component of earth's magnetic field at a certain place is

3.0 \times 10^{-5} \mathrm{T}

and having a direction from the geographic south to geographic north. The force per unit length on a very long straight conductor carrying a steady current of

1.2 \mathrm{A}

in east to west direction is then

Q3PhysicsUnit 13: Magnetic Effects of Current and Magnetism

For the circuit shown in figure, the direction and magnitude of the force on PQR is:

Q4PhysicsUnit 13: Magnetic Effects of Current and Magnetism

A current carrying ring is placed in a magnetic field. The direction of the field is perpendicular to the plane of the ring. Which of the following correct for this? This question has multiple correct options

Q5PhysicsUnit 13: Magnetic Effects of Current and Magnetism

A rectangular loop carrying a current

i

is situated near a long straight wire such that the wire is parallel to one of the sides of the loop and is in the plane of the loop. If steady current lis established in the wire as shown in fig. the loop will

Q6PhysicsUnit 13: Magnetic Effects of Current and Magnetism

A loosely wound helix made of stiff wire is mounted vertically with the lower end just touching a dish of mercury when a current from the battery is started in the coil through the mercury

Q7PhysicsUnit 13: Magnetic Effects of Current and Magnetism

Assertion A current carrying conductor experiences a force in a magnetic field. Reason The net charge on a current carrying conductor is zero.

Q8PhysicsUnit 13: Magnetic Effects of Current and Magnetism

A conducting loop carrying a current is placed in a uniform magnetic field acting perpendicular to the plane of the coil shown in figure. the loop will have a tendency to

Q9PhysicsUnit 13: Magnetic Effects of Current and Magnetism

Three long straight wires

A, B

and

C

are carrying currents as shown in figure. Then the resultant force on B is directed

Q10PhysicsUnit 13: Magnetic Effects of Current and Magnetism

Two straight segments of wire

a b

and

b c

each carrying current

I

, are parallel as shown in fig. The cube edge is

50 \mathrm{cm}

and magnetic field is uniform along

Y

axis having magnitude 0.4 T. If

\boldsymbol{I}=\mathbf{3} \boldsymbol{A}

the force experienced by wire abc in the presence of magnitude field is :

Q11PhysicsUnit 13: Magnetic Effects of Current and Magnetism

A current of

1 A

flowing along positive

x

axis through a straight wire of length

0.5 m

placed in a region of a magnetic field given by

\vec{B}=(2 \hat{i}+4 \hat{j})

T. The magnitude and direction of the force experienced by the wire respectively are:

Q12PhysicsUnit 13: Magnetic Effects of Current and Magnetism

are used in making electric generators and electric motors.

Q13PhysicsUnit 13: Magnetic Effects of Current and Magnetism

Assertion The magnetic force on the closed loop in fig is zero Reason Force (magnetic) on the wire is

\int d F=

\int i d \vec{l} \times \vec{B}

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