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Q.

Is it true that the force exerted by a magnet on a piece of iron is also a contact force?


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a

True

b

False 

answer is B.

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Detailed Solution

The above statement is False.
A Contact force is a force that is applied by objects in contact with each other. The contact force acts on the point[23][24] of direct contact between two objects. This force can either be a continuous force or can be momentary in the form of an impulse. The magnet does not come in contact with the exertion of force. Hence, the force exerted by a magnet on a piece of iron is not a contact force.
The correct statement would be, the force exerted by a magnet on a piece of iron is a magnetic force.
 
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Is it true that the force exerted by a magnet on a piece of iron is also a contact force?