Poles

Q.
What will happen to the position of the needle of the magnetic compass if you bring a bar magnet of known poles near it? Also state the effect when the other end of the bar magnet is brought near it.

1. The needle will move in random directions.
2. The needle will align itself according to the poles of the magnet.
3. The two ends of the needle will get attracted towards two opposite poles of the magnet.
4. The needle will keep pointing towards Earth's geographical North.

Q. A ring magnet has pole(s).

1. one
2. two
3. three

Q. The poles of a magnet have the strongest magnetic force.

1. True
2. False

Q. When the south pole of a bar magnet is brought near the north pole of a ring magnet, they will ______each other.

1. attract
2. repel
3. reflect
4. None of the above

Q.

The given figure shows a magnetic compass. What will happen to the position of its needle if you bring a bar magnet near it? Draw a diagram to show the effect on the needle on bringing the bar magnet near it. Also, draw the diagram to show the effect when the other end of the bar magnet is brought near it.

Fig. 13.6

Q.

When a bar magnet is cut into two equal pieces perpendicular to its length, each piece is a magnet with _______ pole strength.

1. Same

2. Double

3. Half

4. Four times

Q.

North pole of a magnet can be identified with the help of:

1. Another magnet with the poles unmarked.
2. Using an ordinary iron bar.
3. Using iron filings.
4. Another magnet having its poles marked.

Q.

A toy car has a bar magnet hidden inside its body along its length. How can one find out which pole of the magnet is facing the front of the car?

1. With the help of ordinary iron bar.
2. With a bar magnet with its poles unmarked.
3. With a bar magnet with its poles marked.
4. With the help of iron fillings.

Q. Iron filings are spread on a paper and a bar magnet is brought near it. It is observed that most of the iron filings are concentrated at ________ of the magnet.

1. all places
2. the ends
3. the centre
4. one end

Q. Iron is attracted to _________.

1. magnets
2. conductors
3. insulators
4. reflectors

Q.

If a bar magnet is cut into two pieces, then one piece will have only the north pole and the other will have only the south pole.

1. True
2. False

Q. The needle of the compass is made of a magnet because it _______
(i) Attracts metal like iron and steel.
(ii) Gets deflected when a magnet is brought near to it
(iii) Comes to rest in East-West direction
(iv) Comes to rest in a North-South direction
Which of the above statements correctly fill the blank?

1. (i) & (ii)
2. (i), (ii) & (iv)
3. (ii) & (iv)
4. (ii) only.

Q.

A bar magnet is immersed in a heap of iron filings and pulled out. The amount of iron filing clinging to the:

1. North pole is almost equal to the South pole.
2. North pole is much more than the South pole.
3. North pole is much less than the South pole.
4. whole magnet will be uniform all along its length.

Q.

A bar magnet is cut into two halves A and B as shown in the figure. Which of the following inferences will be true?

1. The two pieces will not behave as magnets anymore.
2. Each of the two pieces will have one pole.
3. Both the pieces will act as magnets, individually.
4. The two pieces can attract as well repel each-other.

Q. A/An can be magnetised by rubbing it with a magnet from one end to the other.

1. copper piece
2. iron piece
3. non-metal

Q. The strength of a bar magnet is at its poles.

1. minimum
2. maximum
3. zero

Q. What is a magnet?

Q. Poles of a bar magnet are located _______.

1. at two extreme ends of the magnet
2. at the center of the magnet
3. at one of the end, together
4. outside the bar magnet

Q. A magnet has ____ poles.

1. two
2. six
3. four
4. three

Q.

Differentiate between magnetic and non-magnetic materials.

Q. Poles of a bar magnet is located at of the magnet.

1. middle
2. two extreme ends
3. only one end

Q. If the iron filings are evenly spread around a bar magnet and then the magnet is shaken a bit, most of the filings are attracted to which portion of the magnet?

1. In the middle
2. On the ends
3. Unpredictable
4. Filings are evenly attracted to the magnet

Q.

Where are the poles of a bar magnet located?