Types of Charges

Q.

How to get to know whether a substance is positively charged or negatively charged after rubbing it ? Explain.

Q. All matter is made up of

1. atoms
2. electrons only
3. protons only
4. neutrons only

Q. How can we know that which thing or body has positive or negative charge? How can we identify the nature of charge?

Q. There are only two kinds of charge - positive charge and negative charge.

1. True
2. False

Q. What is charging by conduction ?

Q. How can you charge a conductor positively by conduction?

Q. Name the physical quantity of which the unit is coulomb :

1. capacitance
2. charge
3. current
4. inductance

Q. Which of the following is true when a comb attracts pieces of paper?

1. both are charged
2. Paper is neutral and comb is charged
3. comb is neutral and paper is charged
4. both are neutral

Q. What is the nature of the force which is experienced between a negatively charged particle and a positively charged particle?

1. Force of attraction
2. Force of repulsion
3. No force is experienced
4. Insufficient information

Q.

The diagram shown below explains that:

1. Like charges attract each other.

2. Unlike charges repel each other.

3. Charges do not react with each other.

4. Like charges repel each other.

Q. A negatively charged rod is touched by an uncharged electroscope. Which of the following statements is true when the rod is removed and the electroscope is grounded?

1. Positive charge flows from the electroscope to the ground.
2. The positive charge flows from the ground to the electroscope.
3. Negative charge flows from the electroscope to the ground.
4. Negative charge flows from the ground to the electroscope.

Q.

An inflated balloon is rubbed with a woollen cloth and in another case, a ballpen refill is rubbed with polythene. When the balloon and refill are brought closer, it is observed that they attract each other. What can we understand by this?

1. Both acquired the same kind of charge.

2. They acquired the opposite kind of charges.

3. One of the object is not charged.

4. Both of them are not charged.

Q. In an atom, positively charged particles called are present at the centre and revolve around it.

1. protons
2. electrons
3. neutrons
4. nuclei

Q. When two charged glass rods, after being rubbed with silk cloths are brought towards each other, they ______.

1. neither attract nor repel
2. attract each other
3. repel each other
4. may attract or repel

Q. Which of the following statements is/are false?

A. A charged object attracts other charged objects and repels other uncharged objects.
B. A body can be charged by rubbing it with another object.
C. The human skin is a conductor of electricity which allows electric charges to move through it.

1. Only A
2. Only B
3. Only C
4. None of the above

Q.

what is an electric charge?