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प्रश्न
What is an artificial magnet? State two reasons why do we need artificial magnets .
उत्तर
An artificial magnet is a magnetized piece of iron (or other magnetic material). Artificial magnets are required because natural magnets have odd and irregular shape and they are not magnetically very strong. Artificial magnets can be given desired shape and made very strong.
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संबंधित प्रश्न
The figure given below shows the magnetic field between two magnets:
Copy the diagram and label theother poles of the magnets.
Which is the weaker magnet?
Explain the following :
When two pins are hung by their heads from the same pole of a magnet, their pointed ends moves apart.
Explain the following :
The north end of a freely suspended magnetic needle gets attracted towards a piece of soft iron placed a little distance away from the needle.
In following figure, draw at least two magnetic field lines between the two magnets.
(b) 
What conclusion is drawn regarding the magnetic field at a point if a compass needle at that point rests in any direction? Give reason for your answer.
Describe two methods of determining the arrangement of the lines of force in the field close to a bar magnet. Give a brief explanation of each method.
Complete the following diagram of magnets to show the lines of force.
What are the properties of a magnet?
State whether true or false. If false, correct the statement.
Magnetic field lines always repel each other and do not intersect.
A wire 10 cm long carrying a current of 1.5 A is held in a uniform magneÑic field in which B = 10-3 T. Calculate the force on the wire if it is held perpendicular to the lines of the magnetic field.
