Compass

Q.

Give any use of a magnetic compass.

Q.

Write four uses of magnets.

Q.

North pole of magnet points towards___ direction of geographical earth.

1. South

2. East

3. North

4. West

Q.

Question 2 (v)

State whether the following statement is true or false.

Bar magnets always point towards North-South direction.

Q.

. Write uses of compass for sailors.

Q.

State true or false:

The magnetic north and south poles of the earth are different from its geographical north and south poles.

1. True

2. False

Q.

Ships and airplanes use what type of compass?

1. magnetic compass

2. gyroscopic compass

3. pressurized compass

4. temperature compass

Q. The south pole of a freely suspended magnet points towards which geographical direction?

1. East
2. North
3. West
4. South

Q.

How do you know when the needle is pointing north?

1. The compass indicates by flashing a beam of light

2. The needle of the compass touches the base of the compass.

3. The end of the needle that is coloured aligns with the line that is marked on the background.

4. The compass indicates via sound

Q.

Why should we pivot the compass needle on a sharp pin?

1. To minimise the magnetic effect on the pin

2. To maximise the magnetic effect on the pin

3. To minimise the friction between the pin and the compass needle

4. To ensure that the compass needle will not drop from the pivoted point.

Q. is a device used by pilots and navigators to find the direction.

1. Barometer
2. Thermometer
3. Magnetic compass

Q.

Name the device which is used by sailors to find direction.

1. Needle

2. Odometer

3. Magnetic compass

4. Speedometer

Q. We should pivot the compass needle on a sharp pin to _______.

1. To minimise the magnetic effect on the pin
2. To maximise the magnetic effect on the pin
3. To minimise the friction between the pin and the compass needle
4. To ensure that the compass needle will not drop from the pivoted point.

Q.

Why does a compass have a lightweight magnet and a frictionless bearing?

1. To allow the needle to turn easier

2. To make it easier to carry

3. All of the above

4. To make the compass more affordable

Q. A magnetic compass is used to indicate

1. directions
2. speed
3. time
4. distance

Q.

Which of these can help you find your way if you are lost?

1. Compass
2. Stick
3. Pencil
4. Leaf

Q. Consider the following statements:

1. A compass is used to show the directions.
2. The needle of a compass is magnetic.
3. The needle of a compass indicates the north and the south directions of the Earth.

Identify the correct statements.

1. Only 1 and 2
2. Only 2 and 3
3. Only 1 and 3
4. All the three

Q.

Which of the following(s) can be used for navigation?

1. Magnetic compass

2. Plastic wire

3. Wooden block

4. Bar magnet

Q. The _______ of a compass is a magnet.

1. pivot
2. needle
3. metal casing
4. glass