Electric Charge Calculation and Generator

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What happens when a rubber rod is brought near another rubber rod?

The two rods will attract each other.

The rods will create a new charge.

The two rods will repel each other. (correct)

There will be no interaction between the two rods.

When a glass rod is rubbed with silk, what happens to the charge on the glass rod?

The glass rod gains a positive charge. (correct)

The glass rod gains a negative charge.

The glass rod's charge is not affected.

The glass rod loses all of its charge.

What is the relationship between the charge on the silk and the charge on the glass rod after rubbing?

The charges cancel each other out.

The charges are equal and of the same sign.

The charges are equal and opposite. (correct)

The charges are unrelated.

Which of the following statements about electric charge is true?

Electric charge is conserved in an isolated system. Signup and view all the answers

How many electrons constitute one coulomb of electric charge?

6.24 x 10^18 electrons Signup and view all the answers

What is the purpose of the text provided?

To explain the concept of electric charge and its properties. Signup and view all the answers

What is the standard symbol used for electric charge as a variable?

q Signup and view all the answers

How many electrons contribute to a charge of 1 Coulomb?

6.25 x 10^10 electrons Signup and view all the answers

What type of charge does an electron carry?

Negative Signup and view all the answers

In the Van de Graaff generator, where is a large amount of charge built up?

On the metal dome Signup and view all the answers

Which part of the Van de Graaff generator usually holds positive charges?

Metal dome Signup and view all the answers

What happens when the charged dome of a Van de Graaff is connected to the earth via a microammeter?

The microammeter reads zero current Signup and view all the answers

What does the deflection of the pointer of the meter indicate?

An electric current flow between the metal dome and the Earth Signup and view all the answers

What happens when a discharging metal sphere is brought closer to the charged dome?

Sparkling occurs and an electric current flows Signup and view all the answers

Why do the hairs of a student stand upright when brought near the charged dome?

The hairs receive positive charges from the dome and the same charges repel each other upwards Signup and view all the answers

Which of the following is NOT an example of a non-contact force?

Normal force Signup and view all the answers

What is the relationship between the electric force on q1 and the electric force on q2 according to Newton's Third Law?

The forces are equal in magnitude and opposite in direction Signup and view all the answers

What does Coulomb's Law state about the relationship between the electric force and the distance between charges?

The force is inversely proportional to the square of the distance Signup and view all the answers

What is the value of Coulomb's constant, $k$, in Coulomb's Law?

$k = 8.9876 \times 10^9 , \text{N,m}^2/\text{C}^2$ Signup and view all the answers

What is the direction of the electric force on the electron in a hydrogen atom exerted by the proton in the nucleus?

The force is directed towards the proton Signup and view all the answers

What is the permittivity of free space, $\text{ extepsilon}_0$, used in Coulomb's Law?

$\text{ extepsilon}_0 = 8.8542 \times 10^{-12} , \text{C}^2/\text{N,m}^2$ Signup and view all the answers

How does the electric force between two like charges change as the distance between them increases?

The force decreases with the square of the distance Signup and view all the answers