Question 1

What is the symbol used for electric charge?

Accepted Answer

q

Answer

C

Answer

E

Answer

N

Question 2

What unit is used to measure electric charge?

Accepted Answer

Coulomb

Answer

Ampere

Answer

Joule

Answer

Volt

Question 3

What is the charge of a single electron?

Accepted Answer

-1.6×10⁻¹⁹ C

Answer

+1.6×10⁻¹⁹ C

Answer

+1.0 C

Question 4

Which scientist is the Coulomb unit named after?

Accepted Answer

Charles Coulomb

Answer

Michael Faraday

Answer

Albert Einstein

Answer

Isaac Newton

Question 5

If a proton has a charge of +1.6×10⁻¹⁹ C, what is the charge of 10 protons?

Accepted Answer

+1.6×10⁻¹⁸ C

Answer

+1.6×10⁻¹⁹ C

Answer

+1.6 C

Answer

+1.6×10⁻²⁰ C

Question 6

Approximately how many electrons make up one Coulomb of charge?

Accepted Answer

6.25×10¹⁸

Answer

1.6×10¹⁸

Answer

1.6×10¹⁹

Answer

6.25×10¹⁹

Question 7

In scientific notation, how would the charge of an electron be written?

Accepted Answer

-1.6×10⁻¹⁹ C

Answer

+1.6×10¹⁹ C

Answer

-1.6×10¹⁹ C

Answer

+1.6×10⁻¹⁹ C

Question 8

What is the result if an object has more protons than electrons?

Accepted Answer

It is positively charged

Answer

It has no charge

Answer

It is neutral

Answer

It is negatively charged

Question 9

What does the term "Coulomb" represent?

Accepted Answer

The amount of electric charge

Answer

The quantity of electric current

Answer

The force between two charged particles

Answer

The distance between charged objects

Question 10

If a particle has a charge of 3.2×10⁻¹⁹ C, how many electrons does it represent?

Accepted Answer

2 electrons

Answer

6.25×10¹⁸ electrons

Answer

1.6×10⁻¹⁹ electrons

Answer

3.2×10¹⁹ electrons

Question 11

Why is scientific notation used when discussing elementary charges?

Accepted Answer

To simplify extremely large or small values

Answer

To add more significant figures

Answer

To change units

Answer

To avoid negative numbers

Question 12

Calculate the total charge of 5×10¹⁸ electrons.

Accepted Answer

-0.8 C

Answer

+0.8 C

Answer

+1 C

Answer

-1 C

Question 13

Which principle states that the total charge remains constant in a closed system?

Accepted Answer

Conservation of Charge

Answer

Conservation of Energy

Answer

Conservation of Mass

Answer

Conservation of Momentum

Question 14

What would be the result of doubling both charges in Coulomb’s Law?

Accepted Answer

Force is quadrupled

Answer

Force is halved

Answer

Force remains the same

Answer

Force is doubled

Question 15

A particle has a charge of -3.2×10⁻¹⁹ C. How many excess electrons does it have?

Accepted Answer

2

Answer

1

Answer

4

Answer

3

Question 16

If a conductor has 1 C of charge, how many excess electrons are there?

Accepted Answer

6.25×10¹⁸

Answer

1×10¹⁹

Answer

6.25×10²⁰

Answer

1.6×10⁻¹⁹

Question 17

What is the electric charge on a system with 10 protons and 10 electrons?

Accepted Answer

0 C

Answer

-1.6×10⁻¹⁸ C

Answer

+1.6×10⁻¹⁸ C

Answer

+1.6×10⁻¹⁷ C

Question 18

If two charges of +1 C are placed 1 meter apart, what would happen to the force if the distance is doubled?

Accepted Answer

Force is quartered

Answer

Force remains the same

Answer

Force is doubled

Answer

Force is halved

Question 19

Using Coulomb's Law, if two charges +1 C and -1 C are 2 meters apart, what is the magnitude of the force?

Accepted Answer

1.125×10⁹ N

Answer

2.25×10⁹ N

Answer

9×10⁹ N

Answer

4.5×10⁹ N

Question 20

If 0.5 Coulombs of charge flow through a wire in 2 seconds, what is the current?

Accepted Answer

0.041666666666666664

Answer

0.08333333333333333

Answer

0.25 A

Answer

0.5 A

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