Solenoid

Q.

The direction of current in a solenoid is observed from one end. If the direction of current is anti-clockwise, the end of the solenoid acts as a north pole and vice-versa.

1. True

2. False

Q.

The magnetic field lines at the axis of the current-carrying solenoid are

1. perpendicular to the axis of the solenoid

2. circles with centers on the axis of the solenoid

3. parallel to the axis of the solenoid

4. spirals about the axis of the solenoid

Q.

For a current in a long straight solenoid N- and S-poles are created at the two ends. Among the following statements, the incorrect statement is (a) The field lines inside the solenoid are in the form of straight lines which indicates that the magnetic field is the same at all points inside the solenoid (b) The strong magnetic field produced inside the solenoid can be used to magnetise a piece of magnetic material like soft iron, when placed inside the coil (c) The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet (d) The N- and S-poles exchange position when the direction of current through the solenoid is reversed

1. The field lines inside the solenoid are in the form of straight lines which indicates that the magnetic field is the same at all points inside the solenoid

2. The strong magnetic field produced inside the solenoid can be used to magnetise a piece of magnetic material like soft iron, when placed inside the coil

3. The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet

4. The N- and S-poles exchange position when the direction of current through the solenoid is reversed

Q.

A soft iron bar is placed inside a current-carrying solenoid. The magnetic field inside the solenoid will _____.

1. decrease
2. increase
3. become zero
4. remain the same

Q.

The strength of the magnetic field inside a long current carrying a straight solenoid is

1. more at the ends than at the center

2. minimum in the middle

3. same at all points

4. found to increase from one end to the other

Q.

For current in a long straight solenoid, North and South poles are created at the two ends. Among the following statements, the incorrect statement is

1. The field lines in a solenoid, as well as a bar magnet form, closed loops.

2. The pattern of the magnetic field of a solenoid and bar magnet are not identical.

3. The poles of a solenoid are reversed if the direction of current through it is reversed.

4. A solenoid can be used to magnetise a piece of magnetic material like iron.

Q.

The magnetic field strength of a current carrying solenoid increases with a rise in its temperature.

1. True

2. False

Q.

The magnetic field inside a long straight solenoid-carrying current

1. is zero
2. decreases as we move towards its end
3. increases as we move towards its end
4. is the same at all points

Q.

The magnetic field inside a long straight solenoid carrying current

1. is zero

2. increases along its radius

3. increases as we move towards its ends

4. is the same at all points

Q.

The magnetic field strength of a current carrying solenoid increases with

1. length

2. current

3. None of these

4. temperature

Q.

If the direction of electric current in a solenoid, when viewed from one of its ends, is anticlockwise. The pole of this end of the solenoid is ___ .

1. west pole

2. south pole

3. north pole

4. east pole

Q.

The field inside a solenoid is ___ proportional to current.

Q. Question 4
For a current in a long straight solenoid N- and S-poles are created at the two ends. Among the following statements, the incorrect statement is

(a) The field lines inside the solenoid are in the form of straight lines which indicates that the magnetic field is the same at all points inside the solenoid
(b) The strong magnetic field produced inside the solenoid can be used to magnetise a piece of magnetic material like soft iron, when placed inside the coil
(c) The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet
(d) The N- and S-poles exchange position when the direction of current through the solenoid is reversed​​​​​​​

Q.

The magnetic field inside a long straight solenoid carrying current

1. decreases as we move towards its end

2. increases as we move towards its end

3. is the same at all points

4. is zero

Q.

For a current in a long straight solenoid, $N$ and $S$ poles are created at the two ends. Among the following statements, the incorrect statement is:

1. The field lines in a solenoid as well as a bar magnet form closed loops

2. The strong magnetic field produced inside the solenoid can be used to magnetise a piece of magnetic material like soft iron, when placed inside the coil

3. The magnetic field associated with the solenoid is different from the magnetic field around a bar magnet

4. The N- and S-poles exchange positions when the direction of current through the solenoid is reversed.

Q.

Question 3
Choose the correct option.
The magnetic field inside a long straight solenoid-carrying current
(a) is zero
(b) decreases as we move towards its end
(c) increases as we move towards its end
(d) is the same at all points

Q.

A magnet attracts

1. iron and steel

2. aluminium

3. any metal

4. plastics