Question
Explain, why magnetic force is said to be a non-contact force.

Answer

Magnetic force is acted upon a body by the magnetic lines of force. These are imaginary closed line of lines of force which emanate from the N pole f the magnet and goes into the S pole of the magnet. So, a magnet can influence a magnetic material like a piece of iron even when they are not in contact thus magnetic force is a non contact force.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

What is meant by ‘sowing’? What are the various methods of sowing the seeds?
A student makes a device P by using three long and narrow strips of plane mirrors inclined at $60^\circ $ to one another which enables him to see beautiful patterns made by pieces of coloured glass bangles. On the other hand, another student makes a device $Q$ by using two plane mirrors arranged parallel to each other which helps him to see a football match clearly even when some very tall persons are sitting in front of him in the ground. What are $P$ and $Q?$
Anu wants to boil water quickly in a test tube. On observing the different zones of the flame, she is not able to decide which zone of the flame will be best for boiling water quickly. Help her in this activity.
What is a tissue? Give two examples of tissues.
Discuss the different ways in which communicable diseases spread from person to person.
Consider the following reaction where two substances, A and B, combine to form a product C:
A + B → C
Assume that A and B cannot be broken down into simpler substances by chemical reactions. Based on this information, which of the following statements is correct?
(i) A, B, and C are all compounds, and only C has a fixed composition.
(ii) C is a compound, and A and B have a fixed composition.
(iii) A and B are compounds, and C has a fixed composition.
(iv) A and B are elements, C is a compound, and has a fixed composition.
An archer shoots an arrow in the air horizontally. However, after moving some distance, the arrow falls to the ground. Name the initial force that sets the arrow in motion. Explain why the arrow ultimately falls down.
Is it possible for a substance to be classified as both an element and a compound? Explain why or why not.
Explain why car wheels often spin on icy road.
Give one use each of the following metals:
$a.$ Iron
$b.$ Copper
$c.$ Aluminium
$d.$ Zinc
$e.$ Mercury