Properties of Magnetic Field Line

Q.

Magnetic field lines start from North pole and end at South pole.

1. True
2. False

Q. Magnetic force is a scalar quantity.

1. True
2. False

Q. Which of the following are true about magnetic field lines in a magnet?

1. Field lines outside a magnet originates from North pole and ends at South pole.
2. The field lines intersect each other.
3. The field lines form closed loops.
4. They originate outside the magnet from South pole and ends at North pole.

Q.

What is the direction of magnetic field lines outside the bar magnet?

Q. Magnetic fields can penetrate through water and plastic but the intensity would change in each case.

1. True
2. False

Q. The intensity of the magnetic field necessarily depends upon_______.

1. size of the magnet
2. shape of the magnet
3. number of lines of force per unit area
4. material of the magnet

Q.

Painting a magnet drastically reduces the magnetic properties.

1. True

2. False

Q. Magnetic field lines repel each other.

1. True
2. False

Q. Which of the following statements are true for the magnetic field lines?

1. Inside a bar magnet, they flow from south to north pole.
2. Outside a bar magnet, they flow from south to north pole.
3. Outside a bar magnet, they flow from north to south pole.
4. Inside a bar magnet, they flow from north to south pole.

Q.

Magnetic lines of force

1. Have more directions

2. Have no physical reality

3. Can be used to indicate the direction of the magnetic field of a point

4. All the above

Q.

Magnetic field lines are imaginary.

1. True

2. False

Q. Magnetic field lines were introduced to explain the concept of magnetic attraction and repulsion.

1. False
2. True

Q.

Two magnetic lines of force don't intersect each other. Explain why? [2 MARKS]

Q. Match the following according to their properties.

1. Maximum strength
2. Magnetic needle
3. Natural magnet

Q.

1. Magnetic field lines around a magnet cannot intersect.
2. When magnetic field lines intersect, the compass at the point of intersection can point in two different directions.
Choose the correct option.

1. 1 and 2 are true, and are independent

2. Only 1 is true

3. 1 and 2 are true, and 2 is the reason why 1 is true

4. Only 2 is true

Q. Magnetic field lines are ________ .

1. real
2. virtual
3. imaginary
4. opaque

Q. The diagram shows magnetic field lines in a magnetic field. A, B, and C are the three points in the field. Where will the field strength be maximum?

1. C
2. B
3. A
4. Same at all the points.

Q.

Magnetic field lines have which of the following properties?
1. Magnitude
2. Direction
3. Colour

1. Only 1

2. 1 and 3

3. 1 and 2

4. 1, 2 and 3

Q. Which of the following holds true for magnetic field lines?

1. The magnetic field lines attract each other.
2. The magnetic field lines do not intersect each other.
3. The magnetic field lines intersect each other.
4. The magnetic field lines behave as if they repel each-other.

Q.

From the figure given below, choose the points where the net magnetic field induction is zero.

1. B

2. C

3. A

4. D

Q.

The question Statement $I$ (Assertion) and Statement $II$ (Reason). The question has $4$ choices (a), (b), (c) and (d) out of which ONLY ONE is correct. So, select the correct choice.

Statement $I$: There are more field lines coming out from north pole as compared to number of field lines entering into the south pole.

Statement $II$: In general, the poles of the magnet are having equal pole strength and are of opposite nature.

1. Statement $I$ is True, Statement $II$ is True; Statement II is a correct explanation for Statement $I$

2. Statement $I$ is True, Statement $II$ is True; Statement II is NOT a correct explanation for Statement $I$

3. Statement $I$ is True, Statement $II$ is False

4. Statement $I$ is False, Statement $II$ is True

Q. Magnetic field lines can exist in _______.

1. only vacuum
2. only liquids
3. only solids
4. any medium

Q. Write true or false for each statement.
Poles of a magnet cannot be separated.

1. true
2. false

Q. Magnetic field lines ______

1. intersect near the poles.
2. intersect inside the magnet.
3. do not intersect.
4. intersect on the midway out side the magnet.

Q. A magnetic field exists in the region surrounding a magnet, in which the force of the magnet can be detected. Is the given statement true or false?

Q.

Magnetic field lines always form________.

1. both closed loops and open loops

2. straight lines

3. closed loops

4. open loops

Q.

Choose the correct one:

1. Magnetic field lines go from north pole to the south pole outside the magnet.

2. Magnetic field lines go from south pole to the north pole outside the magnet.

3. Magnetic field lines emerge from south pole and move away from the magnet

4. Magnetic field lines emerge from north pole and move away from the magnet