Properties of Electric Charge

Q.

What are the three ways in which a body can be charged?

1. friction, radiation, induction

2. friction, conduction, induction

3. radiation, conduction, induction

4. friction, conduction, convection

Q.

________charge is acquired by a glass rod when it is rubbed with wool.

1. Coloumb

2. Negative

3. Positive

4. Neutral

Q.

A positively charged rod is brought close to one end of a neutral metallic plate. What type of charge is induced on the closest side of the plate?

1. Positive

2. Negative

3. Neutral

4. It depends on the separation between the rod and the plate

Q.

Two unlike charges will:

1. either attract or repel

2. neither attract nor repel

3. repel each other

4. attract each other

Q. Two points charges q1 and q2 are 3m apart and their combined charge is 20/101010101010.If one repels the other with a force of 0.075 N , what are two charges?

Q. What is accommodation of charges?

Q.

Why does sparking occur?

Q.

State true or false.
Electric sparks due to Lightning have the same phenomenon as that of the sparks observed when one takes off woollen clothes.

1. True

2. False

Q.

Question 17

If air and cloud were good conductors of electricity, do you think lightning could occur? Expalin.

Q.

Two like charges will:

1. either attract or repel

2. neither attract or repel

3. repel each other

4. attract each other

Q.

Two balloons rubbed with hair will attract each other.

1. True
2. False

Q.

During electrification by friction

1. protons are transferred from one body to another body.

2. neutrons are transferred from one body to another body.

3. electrons are transferred from one body to another body.

4. None of these

Q. What is static electricity? Explain why a charged body loses its charge if we touch it with our hand. [3 MARKS]

Q.

An aircraft, flying underneath a negatively charged thunder cloud is induced with positive charges. Which side of the aircraft becomes negatively charged?

Q. If an object becomes negatively charged after rubbing, it means that:

1. It has lost some electrons
2. It has gained some electrons
3. It has gained some protons
4. It has lost some protons

Q.

An aircraft, flying underneath a negatively charged thunder cloud is induced with positive charges. Explain your answer in terms of the movement of electrons.

Q. Pick the material that freely allows electrons to pass through.

1. Wood
2. Rubber
3. Silver
4. Cotton

Q.
What causes lightning?

Q.

When an ebonite rod is rubbed with the cat skin, compare the magnitude of charges acquired by them, and state the nature of charges on them.

Q.

If a positively charged object has an affinity to attract another body then what charge does the other body possesses.

1. No charge

2. Both b and c

3. Negative

4. Positive

Q. Similar charges ............. each other whereas opposite charges ............. each other.

1. repel, attract
2. attract, repel
3. repel, repel
4. attract, attract

Q. Two balls with like charges are suspended freely as shown in the figure. Which of the following depicts the behavior of the balls?

1. neither attract nor repel

2. either attract or repel

3. repel each other

4. attract each other

Q.

The diagram shown below explains that:

1. Like charges repel each other

2. Like charges attract each other

3. Unlike charges repel each other

4. Charges do not react with each other

Q.

Like charges ______ and unlike charges ______ each other.

Q.

When two charged glass rods, after being rubbed with a silk cloth are brought towards each other, they ___.

1. neither attract nor repel

2. cannot be determined

3. attract each other

4. repel each other

Q.

Two metal balls are suspended as shown in the figure. A glass rod is rubbed with silk to make it charged. Now, both the balls are individually touched with this glass rod. What would we observe?

1. The balls will heat up.
2. The balls attract each other.
3. The balls repel each other.
4. Neither attraction nor repulsion

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. When a body is charged by friction its mass ?
a)remains same
b)increases
c)decreases
d)depends on charge gained
Answer is increases.
But how is it possible because mass must depend upon charge gained bcz charge is gain or loss of electron and electrons have mass so loss of electrons must result into decrease in mass. And in friction gain or loss of electrons occurs