WorksheetsFun With Magnets
Total questions: 30
Worksheet time: 3600secs
The process by which an object exerts a force on another that is directed towards the source of the force is called attraction. The process by which the object forces another away from itself is called repulsion.
What will happen in the following scenario?
A will be repelled by B.
B will be attracted to A.
The magnetic field lines will not bend towards each other.
The magnetic field lines will bend away from each other.
There are some properties of magnets which help us to understand them better.
Which of the following is not a property of magnets?
Magnets can’t exert their influence through air and water.
A freely suspended magnet always comes to rest in the north-south direction.
Like poles repel, whereas unlike poles attract each other.
None of these.
The materials which are attracted towards magnets are called magnetic substances.
Which of the following is not a magnetic substance?
Nickel
Cobalt
Aluminium
Gadolinium
There are three types of magnets — permanent magnets, temporary magnets and electromagnets. The magnets that remain magnetic until they are severely damaged are called permanent magnets.
Which of the following is not used to make permanent magnets?
Soft iron
Hard iron
Steel
Alnico
There are many types of magnetic substances. They may be paramagnetic, diamagnetic, ferromagnetic materials or ferrites.
What are paramagnetic materials?
The materials which are not strongly attracted towards a magnet.
The materials which are repelled by a magnet.
The materials which are strongly attracted by a magnet.
The materials that occupy an intermediate position between ferromagnetic and non-ferromagnetic materials.
Magnetic field can be measured using a magnetometer.
The official SI unit for measuring magnetic field strength is
Tesla
Volt
Ampere
Hertz
It is a property of magnets to always come into rest in the north-south direction.
Why is it so?
The North Pole of the magnet points towards the geographical South Pole because it is attracted by the geographical North Pole.
The South Pole of the magnet points towards the geographical North Pole because it is attracted by the geographical South Pole.
The North Pole of the magnet points towards the geographical North Pole because it is attracted by the earth’s magnetic South Pole.
The South Pole of the magnet points towards the geographical South Pole because it is repelled by the geographical North Pole.
It has been proved that our body is indeed magnetic in the sense that the body is a source of magnetic fields.
The following investigation (study) uses the body’s natural magnetic properties to produce detailed images of any part of the body:
Magnetic Resistance Imaging
Magnetic Resonance Imaging
Magnetic Receptor Imaging
Magnetic Repellent Imaging
Magnets are used widely in daily life. They are used in pencil boxes, doors, refrigerators, speakers, earphones, televisions, computers etc.
The name of the train transportation system that uses magnets is:
Magnet train
Magneto-train
Magnes-train
Maglev train
There are certain precautions to be taken while handling magnets.
Following are the precautions to be observed while handling magnets except:
They should not be heated.
They should be kept away from things televisions, computers etc.
They should not be hammered.
They should not be dropped in water.
When magnets are not in use, they should be stored properly. Magnets tend to become weaker after sometime if the poles are left free.
To avoid the above problem, bar magnets should always be stored in pairs between soft iron pieces called (a) .
Magnets lose their power if hammered, dropped from height, or heated.
This process is called (a) .
There are two types of poles — North and South Poles.
If a magnet is broken into four pieces how many poles would be there in all?
(a)
A magnetic needle is placed over a strong bar magnet and is made to move freely.
If the bar magnet comes to rest in the north direction, the magnetic needle comes to rest in the (a) direction.
Magnets have widespread usage. For example, they are used to find directions.
A device that is used to find directions is a (a) .
Most magnets tend to have some properties.
The two ends of a bar magnet are its (a) .
In the sixteenth century, artificial magnets were first made.
Artificial magnets are present in different shapes like ___(magnet), ___ (magnet), and ____ (magnet), and ball ended (magnet).
(a)
The materials which are attracted towards magnets are magnetic substances. The materials which are not attracted by magnets are called non-magnetic substances.
Nickel is a (a) material.
Magnets were discovered in Ancient Greece.
The name of the shepherd who is believed to have discovered magnets was (a) .
The process by which an object exerts a force on another that is directed towards the source of the force is called attraction. The process by which the object forces another away from itself is called repulsion.
Like poles ____ each other and unlike poles ____ each other.
(a)
The phenomenon of the interaction of electric currents or fields and magnetic fields.
How can one make an electromagnet stronger?
By using a magnet (made of soft iron)
By decreasing the number of loops in the coil.
By using an iron piece (such as an iron nail).
By loosening the wire coils.
Boojho has two identical iron bars that look as if they might be made of iron. However, one is a magnet and the other is a simple piece of iron. He wants to find out which one is a magnet. But he is puzzled.
Which method out of the following should he not use to do this?
He can do this by magnetisation.
He can do this by demagnetisation.
He can do this by breaking the pieces.
He can do this by suspending the pieces.
An electromagnet is a type of magnet in which the magnetic field is produced by an electric current.
Is the following statement true or false?
Electromagnets are examples of permanent magnets.
True
False
Magnets can be classified into natural magnets and artificial magnets.
India's 98% magnetite resources are located in five States — Karnataka, Andhra Pradesh, Rajasthan, Tamil Nadu and Goa.
Is the following statement true or false?
Magnetite is a natural magnet.
True
False
Two like poles repel each other. Two unlike poles attract each other.
Is the following statement true or false?
Attraction is the surest test of magnetism.
True
False
The area around a magnet in which a magnetic force can be experienced is called a magnetic field.
Is the following statement true or false?
Magnetic force acts at a distance.
True
False
The earth’s magnetic field acts like a bar magnet and is weak.
Is the following statement true or false?
The earth’s magnetic field is weakest in the Tropics.
True
False
Most planets in our solar system have magnetic fields. The earth is a giant magnet.
Which of the following planets has the strongest magnetic field?
Earth
Saturn
Venus
Jupiter
Magnets are made from various materials artificially.
Which of the following magnets is the strongest?
Neodymium magnets
Alnico magnets
Ceramic magnets
Hard iron magnets
An English physicist was the first to investigate the phenomenon of magnetism with systematic scientific methods.
He also discovered that the earth is itself a weak magnet.
Who was he?
William Sturgeon
William Gilbert
William Shakespeare
William Thomson
