Advertisements
Advertisements
प्रश्न
A charged glass rod attracts a charged plastic straw.
पर्याय
True
False
Advertisements
उत्तर
This statement is True.
Explanation:
A charged glass rod has positive charges on its surface, while a charged plastic straw has negative charges on its surface. Since unlike charges attract each other, a charged glass rod attracts a charged plastic straw.
APPEARS IN
संबंधित प्रश्न
Friction opposes the ______ between the surfaces in contact with each other.
Give examples to show that friction is both a friend and a foe.
Write true or false.
The sliding friction is more than the rolling friction.
Select the correct alternative.
Friction is reduced by
What is the cause of friction?
Name the three kinds of friction.
List three ways of reducing friction.
Give three examples to illustrate that friction is a necessary evil.
Tick the most appropriate answer
Friction always
Tick the most appropriate answer.
Friction is offered by
State if the following statement is true or false. Correct the statement if it is false.
Friction has no relation with our walking or running.
State if the following statement is true or false. Correct the statement if it is false.
Friction helps us to grip the objects in our hand.
State if the following statement is true or false. Correct the statement if it is false.
Friction is offered by all the three states of matter.
Answer the following in a word or two or in a sentence.
Why is difficult for a pen to leave a mark on a highly smooth plastic sheet?
Answer the following in short.
When you push something heavy, the resistance you feel decreases as soon as the object starts moving. Explain the reason.
A moving body comes to rest due to friction alone.
Match the following.
| Column I | Column II | |
| a) | Static friction | Viscosity |
| b) | Kinetic friction | Least friction |
| c) | Rolling friction | Objects are in motion |
| d) | Friction between the liquid layers | Objects are sliding |
| e) | Sliding friction | Objects are at rest |
Is there any possibility of making a special device to measure the magnitude of friction directly?
In the following figure, a boy is shown pushing the box from right to left. The force of friction will act on the box
Friction depends on the ______ of two surfaces in contact.
