Fun with Magnets
This test is standardised achievment test in Physics suitable for the students of cbse,icse and all other boards of class 6 and also useful for the students of diferent competitions and olympiads.
Questions
Which of the following is preferred to make an electromagnet?
- Soft iron
- Steel
- Plastic
- Glass
- Cobalt
The poles of a magnet are located at its
- upper surface
- lower surface
- middle point
- ends
- whole surface
A magnetic compass is placed at the mid point of a bar magnet. The correct observation will be that
- it will point in the North-South direction
- it will align along the length of the bar magnets with its N-pole towards the N-pole of the bar magnet
- it will align along the length of the bar magnet with its N-pole towards the S-pole of the magnet
- it will point randomly in any direction
- it will align along the length of the bar magnets with its S-pole towards the S-pole of the bar magnet
How many number of poles are there are in a magnet?
- 4
- 5
- 3
- 2
- 6
In which of the following is a ceramic magnet used?
- Refrigerator door
- Loud speakers
- Telephones
- Computers
- Dynamos
Magnets do not lose their properties significantly when
- left in open
- the magnet is hammered several times
- dropped from a height
- an alternating current is passed around the magnet
- the magnet is heated to a very high temperature
A matchbox containing an unknown object, is placed on a thin glass table. From the other side of the glass i.e. below the table, a bar magnet is brought in front of the matchbox. When the bar magnet moves, it is able to drag the matchbox along. What is in the matchbox?
- Marble
- Match-sticks
- Steel ball bearings
- Rice grains
- Glass beads
Which of the following items is needed to make an electromagnet?
- An iron nail, a battery and a copper wire
- An iron nail, a battery and a light bulb
- An iron nail, a light bulb and copper wire
- A battery, a light bulb and a copper wire
- An iron nail, a battery and a thread
Magnetic lines of force ______________.
- are closed and continuous curves
- travel in the East-West direction
- always intersect each other
- can travel in any direction
- depend upon the shape of magnet
Which of the following is a natural magnet?
- Loadstone
- Alnico
- Magnadur
- Bar magnet
- Alconico
The power of the magnetic force __________.
- increases from North pole to South pole
- is same all over the magnet
- is minimum near its ends and maximum in the middle
- decreases from North pole to South pole
- maximum near its ends and decreases towards the middle
We can magnetise a magnetic substance without touching it by a magnet by
- single touch method
- double touch method
- magnetic induction
- using electric current
- using magnetic compass
A freely suspended magnet, rests in the
- N-E direction
- E-W direction
- W-E direction
- S-N direction
- N-S direction
Which of the following is the surest test of magnetism?
- Attraction
- Repulsion
- Diffusion
- Induction
- De-magnetise
A magnetic keeper is
- a person who looks after magnets
- a piece of aluminium that is placed at the ends of the two bar magnets
- a piece of steel that is placed at the ends of the two bar magnets
- a piece of soft iron that is placed at the ends of the two bar magnets
- a box in which magnet is kept