Magnetic Field Due to a Straight Current Carrying Conductor

Q.

The direction of magnetic lines of force produced by passing a direct current in a straight conductor are :

1. Perpendicular to the conductor & coming outwards

2. Parallel to conductor

3. Surrounding the conductor and of circular nature

4. Perpendicular to the conductor & coming inwards

Q.

When a wire is carrying current, the magnetic field around the conductor can be found by ___ hand thumb rule.

Q.

Which of the following correctly describes the magnetic field near a long straight wire?

1. The field consists of straight lines perpendicular to the wire
2. The field consists of straight lines parallel to the wire
3. The field consists of radial lines originating from the wire
4. The field consists of concentric circles centered on the wire

Q.

A current is passed through a straight wire. Then the shape of lines of forces established around it is ?

1. Circular

2. Oval in shape

3. All of the above

4. Straight lines

Q. Which of the following rules is used to determine the direction of induced current in a generator?

1. Right hand thumb rule
2. Left hand thumb rule
3. Fleming's left hand rule
4. Fleming's right hand rule

Q. Draw magnetic field lines for parallel current carrying wires when:
A. Direction of currents is same
B. Direction of currents is opposite
[4 Marks]
[Magnetic Field Due to a Straight Current Carrying Conductor]

Q.

Magnetic field lines due to a conductor is as shown below. Then which of the following is true?

1. No Current in AB

2. Current flows from B to A

3. Current flows from A to B

4. None of these

Q.

Which of the following correctly describes the magnetic field lines near a long straight wire?

1. The field consists of straight lines perpendicular to the wire

2. The field consists of straight lines parallel to the wire

3. The field consists of radial lines originating from the wire

4. The field consists of concentric circles centred on the wire

Q.

Which instrument can be used to show that magnetic field exists around a wire carrying current? Why does a compass needle get deflected when brought near a bar magnet? [3 MARKS]

Q.

The magnetic field lines due to a straight wire carrying current is:

1. Straight

2. Circular

3. Parabolic

4. Elliptical