Properties of Magnetic Field lines

Q.

State four properties of magnetic field lines.

Q.

Can two magnetic field lines intersect each other ? Give reason to your answer.

Q.

The ___ at any point on magnetic field line gives the direction of magnetic field at that point.

Q.

Which of the following statement concerning magnetic field is correct?

(1) The part of a bar magnet, at which the magnetic field is the strongest, is called its pole.

(2) A magnetic field is never created by a compass needle.

(3) Magnetic lines of forces can intersect each other.

1. (2) only

2. (2) and (3) only

3. (1)only

4. (1) and (2) only

Q. Magnetic field lines enter the bar magnet through the .

1. centre of the bar
2. south pole
3. north pole

Q.

explain why 2 magnetic lines cannot intersect each other

Q. The field lines in a uniform magnetic filed are:

1. Intersecting
2. Equidistant
3. (b) and (c) above.
4. Parallel

Q. The magnetic field strength at $1,2,$ and $3$ in the following picture is in the order:

1. $1=2=3$
2. $1>3>2$
3. $1>2>3$
4. $3>2>1$

Q.

Which of the following is/are correct statements:-

1. Inside the magnet, the magnetic field lines are directed from the north pole of the magnet towards the south pole of the magnet.

2. Inside the magnet, the magnetic field lines are directed from the south pole of the magnet towards the north pole of the magnet.

3. Outside the magnet, the magnetic field lines are directed from the south pole of the magnet towards the north pole of the magnet.

4. Outside the magnet, the magnetic field lines are directed from the north pole of the magnet towards the south pole of the magnet.

Q.

Which of the following is/are the properties of a magnet?

1. None of these

2. Exert an attractive or repulsive force on other magnets

3. Have an effect on electrical conductors when the magnet and conductor are moving in relation to each other

4. Attract certain materials - such as iron, nickel, cobalt, certain steels and other alloys

Q. How is the magnetic field strength of the points denoted in the given figures decided? Is it the same at all the given points in both the cases?

Q. List the properties of magnetic field lines. [2 Mark]

Q.

1. both magitude and direction, south, north
2. only magitude, south, north
3. both magitude and direction, north, south
4. only magitude, north, south

Q. No two magnetic lines of force will cut each other?

Q. Magnetic attraction is stronger at the poles.

1. True
2. False

Q. Magnetic field lines enter the bar magnet through the .

1. centre of the bar
2. south pole
3. north pole

Q.

Which of the following activities will result in the loss of magnetic properties?

1. By immersing a magnet in water at room temperature.

2. Heating

3. Hammering

4. Keeping a magnet idle for a long time

Q.

Two magnetic field lines

1. always intersect each other

2. sometimes intersect each other

3. never intersect each other

4. are perpendicular

Q.

The magnetic field lines form a closed loop.

1. True

2. False

Q.

The ___ at any point on a field line gives the direction of magnetic field at that point.

1. perpendicular

2. tangent

3. angle bisector of perpendicular and tangent

4. \N