Advertisements
Advertisements
प्रश्न
When a glass rod is rubbed with a piece of silk cloth the rod ______.
विकल्प
and the cloth both acquire positive charge.
becomes positively charged while the cloth has a negative charge.
and the cloth both acquire negative charge.
becomes negatively charged while the cloth has a positive charge.
Advertisements
उत्तर
When a glass rod is rubbed with a piece of silk cloth the rod becomes positively charged while the cloth has a negative charge.
Explanation:
When an object is charged by rubbing it against another object, the two objects become oppositely charged. By convention, the charge that the glass rod acquired is positive and the charge that the cloth acquired is negative. Therefore, the rod becomes positively charged, and the cloth becomes negatively charged.
APPEARS IN
संबंधित प्रश्न
Iqbal has to push a lighter box and Seema has to push a similar heavier box on the same floor. Who will have to apply a larger force and why?
Give examples to show that friction is both a friend and a foe.
A charged glass rod attracts a charged plastic straw.
Name the two kinds of forces in nature.
State two factors which directly affect the force of friction.
List three ways of reducing friction.
Define sliding friction
Define rolling friction
Fill in the blank.
.................... is the SI unit of force.
Tick the most appropriate answer
Friction always
Tick the most appropriate answer.
A car skids on a wet or muddy road due to
Tick the most appropriate answer.
Friction for an object can be reduced by
Tick the most appropriate answer.
Friction produces
Fill in the blank.
Friction depends upon the ............... of an object.
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 detail.
Describe three different ways by which friction can be increased to help us in various situations?
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 |
Complete the analogy.
Knot in a thread : _____ friction : : Ball bearing : _____ friction
Explain how friction can be minimized.
