Advertisements
Advertisements
Question
A charged glass rod attracts a charged plastic straw.
Options
True
False
Solution
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
RELATED QUESTIONS
Friction opposes the ______ between the surfaces in contact with each other.
Suppose your writing desk is tilted a little. A book kept on it starts sliding down. Show the direction of frictional force acting on it.
When a glass rod is rubbed with a piece of silk cloth the rod ______.
Fill in the blank.
We use ball bearings to .................. the friction.
Select the correct alternative.
Friction is reduced by
State two factors which directly affect the force of friction.
Answer the following in detail.
What are the various effects of force? State one example of each.
Tick the most appropriate answer.
Force of friction comes into play when a/an
Tick the most appropriate answer.
Friction for an object can be reduced by
Tick the most appropriate answer.
If you pour some oil onto a floor, the friction would
Fill in the blank.
Smoother the surface, ................. is the frictional force offered by it.
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 short.
List the various states of matter that offer frictional force?
Answer the following in detail.
Write the characteristics of the force of friction?
Rolling friction is slightly greater than sliding friction.
How do you feel when you touch a nail immediately after it is hammered into a wooden plank? Why?
Explain how friction can be minimized.
We have two identical metal sheets. One of them is rubbed with sand paper and the other with ordinary paper. The one rubbed with sand paper shines more than the other. Give reason.
Friction depends on the ______ of two surfaces in contact.
