Magnetic Field due to Current through a Circular Loop

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

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

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

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

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

Q. The magnetic field strength of a coil is greater when the number of turns in the coil is higher.

1. True
2. False

Q. Two identical coaxial circular loops carry current i each circulating in the clockwise direction. If the loops are approaching each other, then:

1. The net current in each loop increases.
2. The net current in each loop remains the same.
3. The net current in each loop decreases.
4. The net current in one loop increases but it decreases in the other.

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. 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

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

1. True
2. False