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1 : Magnetic lines of force:

1 : are always directed in a straight line

2 : (b) cross one another

3 : (c) enter into the north pole

4 : (d) enter into the south pole

2 : Which one of the following is not a magnetic material?

1 : (a) Cobalt

2 : (b) Iron

3 : (c) Aluminum

4 : (d) Nickel

3 : Permanent magnets are used in:

1 : (a) circuit breaker

2 : (b) loudspeaker

3 : (c) electric crane

4 : (d) magnetic recording

4 : Permanent magnets cannot be made by:

1 : (a) soft iron

2 : (b) steel

3 : (c) neodymium

4 : (d) alnico

5 : A common method used to magnetise a material is:

1 : (a) stroking

2 : (b) hitting

3 : (c) heating

4 : (d) placing inside a solenoid having A.C

6 : If the north pole of one is placed near the wouth pole of other the poles will attract ,we can say that :

1 : Like poles repel and unlike pole attract

2 : both a and b

3 : none of these

4 : Unlike pole repel and like pole attract

7 : How many method use for magnetizing a steel bar?

1 : 2

2 : 4

3 : 5

4 : 3

8 : The steel bar can be stroked in way:

1 : 4

2 : 5

3 : 2

4 : 3

9 : Soft iron is generally used in?

1 : the ion generally used in

2 : the cores of transformers

3 : electromagnets

4 : Both A and B

10 : Electromagnets is widely used in :

1 : Electric bells

2 : Loud speaks

3 : All of these

4 : picking and releasing iron scarp

11 : Soft ion has magnetic permeability?

1 : Low

2 : high

3 : extreme low

4 : extreme high

12 : Which materials exhibit magnetic domain?

1 : Only permanent materials

2 : only diamagnetic materials

3 : ferromagnetic materials

4 : All magnetic materials

13 : What is magnetic domain?

1 : A singe atm with magnetic properties

2 : A type of magnetic fields

3 : A group of atoms

4 : A ferromagnetic materials

14 : If we increase the number of cells in the battery of increase the number of th coil, we will observe:

1 : No change in magnetic field

2 : Magnetic field increase

3 : magnetic field decrease

4 : 0.9 per magnetic field increase

15 : Magnetic relay is a type of _________ which work an electromagnet.

1 : Current

2 : Current –circuit

3 : magnet

4 : Switch

16 : soft ion is used to male:

1 : Temporary magnets

2 : office pins

3 : all of these

4 : paper clips

17 : Theory of magnetism is suggest by :

1 : Boar

2 : Mendeleev

3 : Domain

4 : Maglev’s

18 : What is the size of magnetic domain?

1 : 1cm

2 : 0.1cm

3 : 1mm

4 : 1m

19 : In japan, a bullet train can upon a speed of?

1 : 200km

2 : 400km

3 : 420km

4 : 500km

20 : Each domain behaves as a magnet with its own North an south poles:

1 : Parallel

2 : Small

3 : Maximum

4 : big

21 : Th magnetism induced in a ferromagnetic material can be surprisingly large in th presence of:

1 : Weak external field

2 : Weak external field

3 : strong internal field

4 : strong external field

22 : Circuit breakers protected appliances from:

1 : burning

2 : Current

3 : electricity

4 : power surges

23 : Which materials exhibit magnet domains?

1 : Only paramagnetic materials

2 : Only diamagnetic materials

3 : ferromagnetism materials

4 : A group of atoms

24 : A wonderful use of electromagnets seen in:

1 : first law of motion

2 : second law of motion

3 : third law of motion

4 : momentum

25 : Magnates is a hat acts ate distance upon a magnetic materrrrials:

1 : Magnets

2 : Force

3 : Poles

4 : String

26 : Electric meter is the ____________ process of electricity generator.

1 : Forward

2 : Reverse

3 : Previous

4 : Both a and c

27 : Electromagnets are also kind of :

1 : Temporary

2 : Both a and b

3 : none of these

4 : permanent magnets

28 : Those materials which used in magnetic materials are attached to the: A) Those materials which used in magnetic materials are attracted to the:

1 : Magnets

2 : Force

3 : Poles

4 : String

29 : The lines that correspond to the path off the filling these lines are:

1 : poles lines of force

2 : parallel lines

3 : distance lines of fore

4 : magnetic lines of force

30 : Magnets has ____________ properties.

1 : Nine

2 : Two

3 : Four

4 : None of these

31 : The end of the magnet that points north is known as:

1 : North magnetics pole

2 : South magnetics pole

3 : Identification of Magnet

4 : Magnetics End

32 : the pattern of a magnet field around a bar magnet can be seen by a simple experiment:

1 : with very difficulty

2 : with very hard

3 : with very easily

4 : with very normal

33 : Electromagnets are also good example of :

1 : temporary

2 : permanent magnet

3 : Electromagnet

4 : Magnetic field

34 : How many main types of perment magnet’s?

1 : Three

2 : seven

3 : six

4 : four

35 : Who materials can be made a magnet:

1 : Like poles

2 : Unlike poles

3 : Magnetic poles

4 : Steel and ion

Physics 9th MCQs || Ilam Ghar