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Static Electricity

Description: Static Electricity Static Electricity
Number of Questions: 20
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Tags: Static Electricity
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An atom is usually

  1. electrically neutral

  2. electrically uncharged

  3. both (1) and (2)

  4. either (1) or (2)


Correct Option: D
Explanation:

From the definition of electrostatics, an atom is usually electrically neutral or uncharged.

Which of the following is true?

  1. The direction of conventional current is opposite to the direction of flow of electrons.

  2. The direction of conventional current is same as the direction of flow of electrons.

  3. The direction of conventional current is same as the direction of flow of both electrons and protons.

  4. Either (2) or (3)


Correct Option: A
Explanation:

Option (1) is true as the direction of conventional current is opposite to the direction of flow of electrons.

Which of the following is incorrect when body gains or looses charge?

  1. If a body gains a amount of positive charge the charge on it is + Q.

  2. If a body gains Q amount of negative charge, the charge on it is - Q.

  3. If a body loses Q amount of positive charge, the charge on it is + Q.

  4. If a body loses Q amount of negative charge, the charge on it is + Q.


Correct Option: C
Explanation:

Option (3) is not correct as if a body loses Q amount of positive charge, the charge on it is - Q.

Which of the following is true regarding the unit of charge?

  1. The SI unit of charge is coulomb

  2. One coulomb is very large amount of charge

  3. One micro coulomb is one millionth of a coulomb or 10-6C

  4. All are true


Correct Option: D
Explanation:

All the given statement about the unit of charge is true.

The magnitude of the force between charges depends upon

  1. the magnitude of the charges

  2. the distance between the charges

  3. both (1) and (2)

  4. neither (1) nor (2)


Correct Option: C
Explanation:

Both (1) and (2) are true as the force between charges depends upon the magnitude of charges and distance between the charges. SO 3rd option is true.

Which of the following two charges attract each other?

  1. Two positively charged particles

  2. Two negatively charged particles

  3. One positively charged particle and one negatively charged particle.

  4. None of these


Correct Option: C
Explanation:

One positively charged and one negatively charged particle attract each other while both charge having same charge either both positive or both negative will repel each other. So 3rd option is the answer.

Which of the following is not present in gold leaf electroscope?

  1. Gold leaf

  2. Brass disc

  3. Metallic rubber

  4. Rubber stopper


Correct Option: C
Explanation:

Gold leaf electroscope consists of (1) brass disc (2) rubber stopper (3) brass rod (4) gold leaf. So 3rd option i.e. metallic rubber is not present in the gold leaf electroscope.

An electroscope is an instrument used to detect and compare charges. This instrument can be used to find

  1. whether a body is charged or not

  2. whether the charge on a body is small or large

  3. nature of the charge on a body

  4. all of the above


Correct Option: D
Explanation:

As the definition suggests an electroscope is an instrument used to detect and compare charges. So all the given options are true.

Which of the following statements are true regarding the structure of an atom?

  1. The structure of an atom is somewhat like the solar system

  2. The nucleus is made of protons and neutrons

  3. Electrons have negative charge and move around the nucleus

  4. All the statements are true regarding structure of an atom


Correct Option: D
Explanation:

All the statements given are true as the structure of an atom is somewhat like the solar system. The nucleus is made of protons and neutrons. Protons have positive charge electrons have negative charge and move around the nucleus so 4th option is.

Which statement is not true?

  1. Normally a body has equal amount of positive and negative charge

  2. Normally a body is electrically neutral

  3. A charged body has an excess of one type of charge

  4. A charged body may or may not have excess of one type of charge


Correct Option: D
Explanation:

4th option is not true as a charged body may or may not have excess of one type of charge. It is known that a charged body has an excess of one type of charge.

Which of the following process can be used to charge a body?

  1. Conduction

  2. By the process of induction

  3. Through frictional force

  4. All of these


Correct Option: D
Explanation:

All the above process given can be used to charge a body. So 4th option is the correct answer.

When a charged body comes in contact with an uncharged body

  1. charge flows from the former to the latter body

  2. charge flows from the latter to the former body

  3. this is the charging by induction

  4. both (1) and (3)


Correct Option: A
Explanation:

Option (1) is correct as when a charged body, comes in contact with an uncharged body, charge flows from charged body to uncharged body. Also the process of charging this way is called charging by induction. So 4th option is correct.

Statement incorrect regarding lighting and thunder is

  1. lighting and thunder are caused by the accumulation and separation of charges in the clouds

  2. damages to the building due to lighting can be reduced to a large extent by a lighting conductor

  3. lighting conductor has a set of metal spikes connected by thick metal strip to a large silver plate buried in earth

  4. none of these


Correct Option: C
Explanation:

Option (3) is incorrect as lighting conductor has a set of metal spikes connected by a thick metal strip to a large copper plate buried in the earth.

When an atom loses electrons.

  1. It becomes negative ion

  2. It becomes positive ion

  3. It becomes neutral ion

  4. None of these


Correct Option: B
Explanation:

When an atom loses electrons, its not charge becomes positive, and it is called a positive ion.

What do you mean by charge acquired or charge on a body?

  1. Total amount of negative charge on the body

  2. Total amount of positive charge on the body

  3. The difference between the positive and negative charges on the body

  4. The total sum of protons, neutrons and electrons present in the body


Correct Option: C
Explanation:

The charge on a body is the difference between the positive and negatively charges present on the body. So 3rd option is the correct answer.

Which of the following is safest during thunder storm?

  1. To be indoors during a thunderstorm

  2. Stay from anything that can act as a target for lighting strike

  3. Both (1) and (2)

  4. Neither (1) nor (2)


Correct Option: C
Explanation:

It is safest to be indoors during a thunderstorm. If you are outdoors, crouch down on the balls of your feet, cracking as little contact with the ground as possible. Stay away from anything that can act as a target  for lighting strike.

Why some building are provided with lighting conductors?

  1. To protect building from lighting strikes

  2. To protect building from earthquake strikes

  3. To make the base of body solid

  4. Either (2) or (3)


Correct Option: A
Explanation:

Some building are provided with lighting conductors to protect them form damage from lighting strikes. A lighting conductor consists of a set of metal spikes fitted at the top of a building  and connected by a metal strip to a copper plate buried in the earth. When negative charges are build up in a cloud, positive charges from earth travel through the lighting conductor and air to meet the charges in the cloud and neutralize them.

What do you mean by tribo electric series?

  1. A list of materials arranged in such a way that a material that is higher up in the series becomes positively charged when it is rubbed against another material lower down the series.

  2. A list of materials arranged in such a way that a material that is higher up in the series becomes negatively charged when it is rubbed against another materials lower down the series.

  3. A list of materials arranged in such a way that a material that is lower up in the series becomes positively charged when it is rubbed against another material lower down the series.

  4. None of these


Correct Option: A
Explanation:

A list of materials arranged in such a way that a material that is higher up in the series becomes positively charged when it is rubbed against another material lower down the series.

Which of the following is not present in triboelectric series?

  1. Human hair

  2. Cotton

  3. Polythene

  4. Paper and pencil


Correct Option: D
Explanation:

4th option is not present as pencil is not present although paper is present in the triboelectric series. Option (1), (2) and (3) are present in the triboelectric  series.

Which of the following is not true?

  1. Protons are having positive charge.

  2. Neutrons are having negative charge.

  3. Electrons are having no charge.

  4. Both (2) and (3)


Correct Option: D
Explanation:

Both option (2) and (3) are incorrect as electrons are having negative charge and neutrons are having  no charge or are neutrals so 4th option is the answer.

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