Field Due to Current through a Circular Loop

Q.

The strength of the magnetic field at the centre of a current carrying circular coil depends on

1. the radius of the coil

2. the number of turns in the coil

3. the strength of the current flowing in the coil

4. the orientation of the coil

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. Perpendicular to radius of the coil and coming outward

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

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

4. Perpendicular to radius of the coil and going inward

Q.

Take a piece of thick wire bent in the form of a loop. It is passed at two points P and Q through horizontal cardboard as shown. The iron filings are sprinkled on the cardboard and current is allowed to flow through the battery. The observation(s) in the following experiment is\are

1. In the vicinity of wire at P and Q, the magnetic field lines are nearly circular

2. The magnetic field strength is increased if the strength of the current in the loop is increased

3. In the vicinity of wire at P and Q, magnetic field lines are weak.

4. In the vicinity of wire at P and Q, no magnetic field lines are formed.

Q.

Consider a circular loop of wire lying in the plane of the table. Let the current passing through the loop be clockwise. Apply the right hand rule to find out the direction of magnetic field inside and outside the loop? [2 MARKS]

Q.

The magnetic field line passing through the centre of a circular current carrying conductor is

1. straight line

2. circular

3. parabolic

4. hyperbolic

Q.

A current carrying circular conductor placed on a wooden table. An observer holding a compass is looking at it from the top, notices that the south pole of the compass is pointing towards the table. What is the direction of the current in the conductor as seen by the observer?

1. anticlockwise

2. clockwise

3. downwards

4. upwards