Questions
Which of the following cannot be charged easily by friction?
- A plastic scale
- A copper rod
- An inflated balloon
- A woollen cloth
When a glass rod is rubbed with a piece of silk cloth the rod:
- 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.
What is the frictional order of the following materials on rubbing:
- Wool, glass rod, ebonite, plastic
- Glass rod, wool, plastic, ebonite
- Wool, glass rod, plastic, ebonite
- Glass rod, wool, ebonite, plastic
What kind of electric charge is acquired on a glass rod when it is rubbed with silk cloth?
- Positive charge
- Negative charge
- Partially positive charge
- Partially negative charge
When a plastic rod is rubbed with the fur, what charge does the plastic rod get?
- Positive
- Negative
- Neutral
- None of the above
When an object is rubbed by another, the objects get charged - one as positive and another as negative. In electrostatic series:
- the one being positively charged comes first.
- the one being negatively charged comes first.
- both the objects come together.
- objects appear as per their atomic numbers.
State whether the given statement is True or False :
- True
- False
If we rub our dry forearm with a silk cloth, the hairs on the forearm will stand straight. This is because:
- of the attraction force between the hairs and the cloth.
- of the charge acquired to the forearm due to rubbing.
- of the magnetic field created due to rubbing.
- none of the above.
The electrical charges generated by rubbing are:
- dynamic
- static
- neutral
- none of the above
What happens when charged glass rod is brought near a charged plastic straw when rubbed with silk?
- Repulsion is observed.
- Attraction is observed.
- No reaction is observed.
- None of the above is observed.
Inflate two balloons. Hang them in such a way that they do not touch each other. Rub both balloons with woollen cloth and release them. Then:
- both balloons attract each other.
- both balloons repel each other.
- both balloons remain at same position.
- none of the above happens.
What happens when a used plastic refill is rubbed with polythene?
- Only refill gets charged.
- Refill and polythene gets charged.
- Only polythene gets charged.
- Both gets discharged.
When a person combs his hair static electricity is sometimes generated by:
- friction between comb and hair resulting in flow of electrons.
- induction between comb and hair.
- conducting property of hair.
- contact between comb and hair resulting in a charge.
When charges move, they constitute:
- energy
- light
- power
- electric current
Rub a glass tumbler with wool. Bring an inflated charged balloon, rubbed with wool, near refill. Then
- both balloon and tumbler will repel each other.
- both balloon and tumbler attract each other.
- no reaction will be observed.
- the balloon will burst.
The nature of charge on the object can be detected by:
- microscope
- electroscope
- electrometer
- telescope
When a charge passes from a charged object to an uncharged one, the process is called:
- conduction
- induction
- discharging
- none of the above
What happens when the end of the paper clip of electroscope is touched by hands?
- Electric current is produced
- Foil strips remain as it is
- Foil strips collapse
- None of the above
Opening up of strips of an electroscope is an indication of:
- proximity of a conductor.
- proximity of a charged body.
- proximity of an uncharged body.
- earth connection.
When a charged body is brought near an electroscope:
- the strips of foils opens up.
- the strips of foils close.
- the strips open and close simultaneously.
- the strips neither open nor close.
In the process of earthing, how does charges get discharged to Earth?
- Through some conductor
- Directly to the Earth
- Through transformer
- None of the above
What will be the nature of charge on the metal paper clip of electroscope when a negatively charged body is brought in contact with it?
- Positive
- Negative
- Partially positive
- None of the above
If a object is charged by contact, it will acquire:
- opposite charge.
- negative charge always.
- same charge as the charged body.
- positive charge always.
- earthing
- discharging
- both A and B
- none of the above
The process of transferring of charge from a charged object to the Earth is called:
- lightning
- thundering
- earthing
- all of the above
Spark produced in sky during a thunderstorm are called
- Lightning
- Electric current
- Both A and B
- None of these