Magnetic Field Due to Current Carrying Circular Loop

Q. A circular loop of radius R carrying current I lies in x-y plane with its centre at origin. The total magnetic flux through x-y plane is zero.

1. True
2. False

Q.

Will a circular loop of bigger radius produce higher magnetic field than a loop of smaller radius. If current flowing is same give reason.

Q. 69.How to determine the direction of magnetic dipole moment of a closed loop if current flow is clockwise direction in the loop ?

Q. A small current (i) carrying loop of radius r is placed on the axis of a large current (lo) carryingloop of radiusR Themagnetic force of interaction between loops when distance between their centre is d, is

Q. Which part of current carrying circular loop represents the strongest magnetic field?

1. A point on the circumference of the loop​
2. A point outside the loop​
3. Centre of the loop​
4. A point close to the center of the loop​

Q.

A bar magnet falls along the axis of a circular current carrying loop. The direction of current (i) is as indicated. What can be said about the acceleration of the bar magnet when it comes near the coil?

1. a < g

2. a = 0

3. a > g

4. a = g

Q. Direction of current in the two coils to move them towards each other should be _____ and _____ respectively.

1. clockwise, counterclockwise
2. counterclockwise, clockwise
3. clockwise, clockwise
4. Both A and B

Q. he radius of a circular loop is 0.4 m and the current is 12 A. What is the magnitude of magnetic field at the centre of the loop ? \lbrack Given μ0 = 4 ×10–7 Tm/A\rbrack

Q. A current is flowing in the circular loop. The magnetic field lines point from B to A inside the loop. The north pole of loop is__________.

1. A
2. B
3. A if the current is small
4. B if the current is large

Q.

“When a magnet is brought close to the loop, the induced current in the loop will be in a direction such that the part of the loop facing the magnet repels the magnet.”
Using the above statement, choose the correct answers.

1. When the north pole of the magnet is brought close to the loop, the current will be anticlockwise.

2. When the south pole of the magnet is brought close to the loop, the current will be clockwise.

3. When the south pole of the magnet is brought close to the loop, the current will be anticlockwise.

4. When the north pole of the magnet is brought close to the loop, the current will be clockwise.

Q.

Change in the number of magnetic field lines pasing through a coil induces an emf in the coil.

1. True

2. False

Q. When a current carrying conductor is clasped in such a way that the thumb faces the direction of current, the direction of the curl of fingers corresponds ___.

1. to the direction of the magnetic field
2. to the direction opposite to that of magnetic field
3. perpendicular to the direction of magnetic field
4. to the direction opposite to that of electric current

Q. a Square loop of side 5 cm being moved towards right at a constant speed of 1 cm/s. The front edge enters the 20 cm wide magnetic field at t =0. Find the emf induced in the loop at (a)t=2 s, (b) t =10 s, (c)t =22 and (d)t =30 s.

Q. Question 27
Explain with the help of a labelled diagram the distribution of magnetic field due to a current through a circular loop. Why is it that if a current carrying coil has n turns the field produced at any point is n times as large as that produced by a single turn?

Q. In the given question, the magnetic field at the centre of the loop will point away from you.

1. True
2. False

Q.

Around a current carrying wire, there is a ___.

1. potential energy

2. magnetic field

3. kinetic energy

4. chemical energy

Q. What is the shape of the magnetic field lines at the centre of a current carrying circular ring?

1. Circular
2. Straight line
3. Ellipse
4. Magnetic field is zero at the centre

Q.

What is the direction of the magnetic field at the centre of a current-carrying loop if the current is in the clockwise direction?

1. Parallel to the circular face of the coil from left to right

2. Perpendicular to radius of the coil and coming outward

3. Parallel to the circular face of the coil from right to left

4. Perpendicular to radius of the coil and going inward

Q. A coil having 12 turns is connected to a battery as shown. The magnetic field at the axis of the helix will be ___ the magnetic field at the center of a similar circular loop but with a single turn.

1. greater than
2. equal to
3. lesser than
4. opposite in direction to