Charging by Conduction

Q.

A comb run through ones dry hair attracts small bits of paper. This is due to?

1. Paper is good conductor

2. Comb is a good conductor

3. The comb possesses magnetic properties

4. The atoms in the paper gets polarised by the charged comb

Q.

In general, metallic ropes are suspended on the carriers which take inflammable material. What is the reason?

Q. An inflated balloon is rubbed with a woollen cloth and then, a ballpen refill is rubbed with polythene. When the balloon and the ballpen refill are brought close to each other, it is observed that they attract each other. What can be concluded from this?

1. They acquired different kinds of charges

2. Both acquired same kind of charge

3. One of the object is not charged

4. Both the objects are not charged.

Q.

Two inflated balloons are rubbed with a woollen cloth and are brought close to each other. They repel each other because the nature of charge on one balloon is opposite from the other.

1. True

2. False

Q. Describe a simple experiment to show that the total charge on a pair of objects that have been rubbed together is zero.

Q.

When a glass rod is rubbed with silk cloth, both glass rod, and silk cloth.

1. acquire equal and similar charges

2. acquire equal and opposite charges

3. acquire unequal and opposite charges

4. acquire unequal and similar charges

Q. ​​​​If we rub iron rod with our hair and taking iron rod near to the pieces of paper, will it attaract paper or not ?

Q.

Two bodies A and B (A is bigger than B) are rubbed together. Which of the following statements is true?

1. A and B get equal and opposite charges

2. A and B get equal and similar charges

3. A gets more charge than B, but of opposite kind.

4. A gets less charge than B, but of the opposite kind.

Q. Ever wonder when you look at things in the surrounding, what are they made up of? No? Everything in your surrounding including you, are made up of atoms. Now what is an atom? Atom is made up of electrons, protons and neutrons. Electrons revolve around the protons and neutrons. Protons are positively charged and electrons are negatively charged while neutrons have no charge. Protons are not free to move, hence only electrons can move if we provide them enough energy. The particle which is responsible for the heating of appliances is ______.

1. Neutron

2. Electron

3. Proton and Neutron both

4. Proton

Q. After two balloons were rubbed with the silk saree, it was found that the balloons repelled away from each other. Which of the following explains the observation?

1. Earthing

2. Discharging

3. Hydrolysis

4. Electrolysis

Q.

What is the cause of electrification of two different bodies on rubbing?

1. Transfer of protons

2. Transfer of neutrons

3. Transfer of electrons

4. Transfer of protons and neutrons

Q. A copper rod, a plastic scale, a woollen cloth, and an inflated balloon are given an equal amount of charge initially. The bodies were then individually discharged with the help of identical neutral bodies. Which of them will be discharged first? (Assume that the neutral body is larger in size than all.)

1. Copper rod
2. Inflated balloon
3. Plastic scale
4. Woolen cloth

Q.

Why does ebonite always acquire negative charge when rubbed with any other substance?

Q. How is lighting produced?

Q.

Atom that loses electrons is said to be _______ charge.

Q. When a plastic refill is rubbed with polythene, which object acquires an electric charge?

1. Plastic refill
2. Polythene
3. Environment
4. Both the bodies

Q.

An ebonite rod is rubbed vigorously against fur. What is the nature of the charge on the ebonite rod?

Q.

When an ebonite rod is rubbed with a cats skin, the cats skin ________ the electrons.

Q. When a plastic comb is rubbed with hair, it acquires some charges due to which it attracts tiny pieces of paper. The type of charge, which the comb acquires from the hair is ___.

1. $\alpha$
2. $\beta$
3. Positive
4. Negative

Q.

the substances charged by friction are mostly insulators why??