Electric Charges and Fields: Interactive Learning Quizzes

Question 1

Which of these is NOT a common application of electric fields in our everyday lives?

Accepted Answer

Cooling systems in refrigerators

Answer

Electric motors

Answer

Capacitors

Question 2

Explain Gauss's law, describing how it relates electric flux to the total charge enclosed by a surface.

Accepted Answer

Gauss's law states that the electric flux through a closed surface is equal to the total charge enclosed divided by the permittivity of free space.

Answer

Electric flux is the rate at which electric charge flows through a surface.

Answer

Gauss's law can only be applied to spherical surfaces.

Answer

Electric flux is a measure of the strength of the electric field at a point.

Question 3

Which material allows for the easy flow of electric current?

Accepted Answer

Copper

Answer

Rubber

Answer

Plastic

Answer

Wood

Question 4

What unit in the International System of Units measures electric charge?

Accepted Answer

Coulomb

Answer

Ampere

Answer

Volt

Answer

Ohm

Question 5

What type of force acts between two objects that have electric charges?

Accepted Answer

Electrostatic force

Answer

Gravitational force

Answer

Magnetic force

Answer

Frictional force

Question 6

What is the shape of the electric field surrounding a single electric charge?

Accepted Answer

Spherical

Answer

Circular

Answer

Elliptical

Answer

Cylindrical

Question 7

Which device is used for measuring electric fields?

Accepted Answer

Electroscope

Answer

Voltmeter

Answer

Galvanometer

Answer

Ammeter

Question 8

Which material has a relatively high dielectric constant?

Accepted Answer

Rubber

Answer

Air

Answer

Water

Answer

Copper

Question 9

What is the primary function of a capacitor?

Accepted Answer

To store electric charge

Answer

To increase electric current

Answer

To decrease electric potential

Answer

To convert AC to DC

Question 10

What is the SI unit of electric charge?

Accepted Answer

Coulomb (C)

Answer

Ampere (A)

Answer

Volt (V)

Answer

Ohm (Ω)

Question 11

According to Coulomb's Law, the force between two charged particles is:

Accepted Answer

Inversely proportional to the square of the distance between them

Answer

Directly proportional to the distance between them

Answer

Independent of the distance between them

Answer

Proportional to the cube of the distance between them

Question 12

Which of the following materials is a good conductor of electricity?

Accepted Answer

Metal

Answer

Plastic

Answer

Rubber

Answer

Wood

Question 13

An electric field is:

Accepted Answer

A region around a charged particle where it exerts a force on other charged particles

Answer

A force that acts on all objects with mass

Answer

A type of magnetic field

Answer

A measure of the amount of electric charge in a given region

Question 14

The electric force between two charged particles can be:

Accepted Answer

Attractive or repulsive

Answer

Only attractive

Answer

Only repulsive

Answer

Neither attractive nor repulsive

Question 15

A capacitor is a device that stores:

Accepted Answer

Both electric charge and electric energy

Answer

Electric charge

Answer

Electric energy

Answer

Magnetic energy

Question 16

An electric circuit that allows current to flow in only one direction is called a:

Accepted Answer

DC circuit

Answer

Series circuit

Answer

Parallel circuit

Answer

AC circuit

Question 17

Which of the following is NOT a common application of electric charges and fields?

Accepted Answer

Combustion engines

Answer

Batteries

Answer

Electric motors

Answer

Transistors

Question 18

Which of the following is the SI unit of electric charge?

Accepted Answer

Coulomb

Answer

Ampere

Answer

Volt

Answer

Ohm

Question 19

Two identical positively charged particles are placed close together. What will be the nature of the force between them?

Accepted Answer

Repulsive

Answer

Attractive

Answer

Zero

Answer

Gravitational

Question 20

Which of the following materials allows electric current to flow easily?

Accepted Answer

Aluminum

Answer

Plastic

Answer

Wood

Answer

Rubber

Question 21

What is the definition of electric potential at a certain location?

Accepted Answer

The work done per unit positive charge in moving it from infinity to that location

Answer

The force exerted on a positive charge placed there

Answer

The total charge present at that location

Answer

The resistance offered by that location to electric current

Question 22

Which device transforms electrical energy into mechanical energy?

Accepted Answer

Motor

Answer

Resistor

Answer

Battery

Answer

Capacitor

Question 23

Which of the following units measures electric current?

Accepted Answer

Ampere

Answer

Volt

Answer

Coulomb

Answer

Ohm

Question 24

What factor has a direct proportional relationship with the resistance of a wire?

Accepted Answer

Length

Answer

Thickness

Answer

Conductivity

Answer

Cross-sectional area

Question 25

What is electromagnetic induction? Provide two examples of how it is used in our daily lives.

Accepted Answer

Electromagnetic induction is the process where a changing magnetic field creates an electric field.

Accepted Answer

Power plants use electromagnetic induction to generate electricity.

Accepted Answer

Wireless charging uses electromagnetic induction to transfer power over short distances.

Answer

Electromagnetic induction is the process where an electric field creates a magnetic field.

Question 26

Which type of electric current involves the flow of negatively charged particles?

Accepted Answer

Electron current

Answer

Conventional current

Answer

Ionic current

Question 27

What is the standard unit for measuring electric charge?

Accepted Answer

Coulomb

Answer

Farad

Answer

Ampere

Answer

Volt

Question 28

Which material conducts electricity efficiently?

Accepted Answer

Copper

Answer

Glass

Answer

Plastic

Answer

Wood

Question 29

What equation represents the electric field created by a point charge?

Accepted Answer

E = k * q / r^2

Answer

E = k * q * r^2

Answer

E = q / r

Answer

E = k / r

Question 30

Which of the following is NOT a unit of electrical energy?

Accepted Answer

Ampere

Answer

Joule

Answer

Electronvolt

Answer

Watt-hour

Question 31

Which of the following is the SI unit of current?

Accepted Answer

Ampere

Answer

Coulomb

Answer

Volt

Answer

Ohm

Question 32

What is the fundamental property of matter that gives rise to electric forces?

Accepted Answer

Charge

Answer

Mass

Answer

Energy

Answer

Temperature

Question 33

What is the relationship between the force between two charges and their distance apart?

Accepted Answer

Inversely proportional to the square of the distance

Answer

Directly proportional

Answer

Exponentially proportional

Answer

Logarithmically proportional

Question 34

What is the direction of the electric field produced by a positive charge?

Accepted Answer

Away from the charge

Answer

Downward

Answer

Upward

Answer

Towards the charge

Question 35

Which of the following materials can conduct electricity?

Accepted Answer

Metal

Answer

Plastic

Answer

Rubber

Answer

Wood

Question 36

What is the SI unit of electric charge?

Accepted Answer

Coulomb

Answer

Ohm

Answer

Ampere

Answer

Volt

Question 37

Two protons interact with each other due to

Accepted Answer

Electrostatic force

Answer

No force

Answer

Gravitational force

Answer

Magnetic force

Question 38

Which of the following is a property of electric fields?

Accepted Answer

Exert force on charged objects

Answer

Cannot be shielded

Answer

Have only magnitude

Answer

Exists only around conductors

Question 39

Which device converts electrical energy into mechanical energy?

Accepted Answer

Electric motor

Answer

Battery

Answer

Resistor

Answer

Capacitor

Question 40

Which factor affects the capacitance of a capacitor?

Accepted Answer

Distance between plates

Answer

Length of wires

Answer

Current flowing through plates

Answer

Voltage across plates

Question 41

What is the primary function of a dielectric material used in a capacitor?

Accepted Answer

Increases capacitance

Answer

Blocks current flow

Answer

Decreases capacitance

Answer

Increases voltage across plates

Question 42

What is the SI unit of electric charge?

Accepted Answer

Coulomb (C)

Answer

Ohm (Ω)

Answer

Volt (V)

Answer

Ampere (A)

Question 43

Which of the following materials is a good conductor of electricity?

Accepted Answer

Copper

Answer

Rubber

Answer

Plastic

Answer

Wood

Question 44

What is the direction of the electric field at a point outside a positively charged sphere?

Accepted Answer

Radially outward

Answer

Zero

Answer

Radially inward

Answer

Tangentially

Question 45

What is the purpose of a dielectric material in a capacitor?

Accepted Answer

To increase capacitance

Answer

To prevent current flow

Answer

To store charge

Answer

To decrease capacitance

Question 46

What is the mathematical relationship between electric potential and electric field?

Accepted Answer

Electric field is the negative gradient of electric potential

Answer

Electric potential is the negative gradient of electric field

Answer

Electric field is directly proportional to electric potential

Question 47

Which of the following devices converts electrical energy into mechanical energy?

Accepted Answer

Electric motor

Answer

Transformer

Answer

Battery

Answer

Capacitor

Question 48

Gauss's law states that the electric flux through a closed surface is directly proportional to:

Accepted Answer

The enclosed charge

Answer

The electric field strength

Answer

The surface area

Question 49

Which of the following is a fundamental property of electric charges?

Accepted Answer

They exert forces on each other

Answer

They can be created or destroyed

Answer

They always exist in pairs

Answer

They have mass

Question 50

The SI unit of electric charge is the:

Accepted Answer

Coulomb

Answer

Volt

Answer

Ampere

Answer

Ohm

Question 51

Which of the following materials allows electric current to flow through it easily?

Accepted Answer

Metal

Answer

Plastic

Answer

Rubber

Answer

Wood

Question 52

The electric field strength (E) and the electric potential (V) are related by the equation:

Accepted Answer

E = -dV/dr

Answer

E = dV/dr

Answer

V = Edr

Question 53

When a positively charged object is brought near a neutral object, the neutral object:

Accepted Answer

Becomes polarized

Answer

Becomes negatively charged

Answer

Becomes positively charged

Answer

Remains neutral

Question 54

The electric field lines around a positive point charge point:

Accepted Answer

Radially outward

Answer

Circular

Answer

Radially inward

Answer

Tangential

Question 55

Which of the following is an application of the principle of electrostatics?

Accepted Answer

Electrostatic spray painting

Answer

Internal combustion engine

Answer

Steam engine

Answer

Hydraulic lift