Electric Fields and Charges: Interactive Learning Quizzes

Question 1

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

Accepted Answer

Coulomb

Answer

Ampere

Answer

Volt

Answer

Ohm

Question 2

Coulomb's law describes the relationship between:

Accepted Answer

Electric force, distance, and charge

Answer

Voltage, current, and resistance

Answer

Power, energy, and time

Answer

Magnetic field, current, and length

Question 3

The electric field strength at a location is defined as:

Accepted Answer

Force per unit positive charge

Answer

Potential energy per unit charge

Answer

Current per unit area

Answer

Voltage drop per unit distance

Question 4

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

Accepted Answer

Copper

Answer

Rubber

Answer

Glass

Answer

Wood

Question 5

The electric field lines around a positively charged particle:

Accepted Answer

Point away from the particle

Answer

Point towards the particle

Answer

Are parallel to the particle

Answer

Form closed loops

Question 6

When the electric field strength at a point is doubled, what happens to the electric potential at that point?

Accepted Answer

It is doubled

Answer

It is halved

Answer

It is quadrupled

Answer

It remains the same

Question 7

Which of the following is the unit of electric field strength?

Accepted Answer

Volt per meter

Answer

Coulomb per square meter

Answer

Newton per coulomb

Answer

Ampere per square meter

Question 8

The direction of an electric field line indicates:

Accepted Answer

The direction of the electric field

Answer

The direction of force on a positive charge

Answer

The direction of force on a negative charge

Answer

The direction of motion of a charge

Question 9

A positively charged particle experiences a force due to an electric field. The direction of the force will be:

Accepted Answer

In the direction of the electric field

Answer

Opposite to the direction of the electric field

Answer

Perpendicular to the electric field

Answer

Zero

Question 10

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

Accepted Answer

Copper

Answer

Rubber

Answer

Glass

Answer

Plastic

Question 11

The process of transferring electric charge from one object to another by direct contact is called:

Accepted Answer

Conduction

Answer

Induction

Answer

Electrostatic discharge

Answer

Polarization

Question 12

which of the following is NOT a type of electric charge?

Accepted Answer

Magnetic charge

Answer

Positive charge

Answer

Neutral charge

Answer

Negative charge

Question 13

Which of the following equations represents Coulomb's law, which describes the force between two charged particles?

Accepted Answer

F = k * q1 * q2 / r^2

Answer

F = q * E

Answer

E = k * q / r^2

Answer

q = V / C

Question 14

What is the SI unit for electric field strength?

Accepted Answer

Volt per meter

Answer

Coulomb

Answer

Farad per meter

Answer

Ampere

Question 15

What is the direction of the electric force between two positively charged particles?

Accepted Answer

Repulsive

Answer

Attractive

Answer

Zero

Question 16

How is electric field strength related to the electric charge that produces it?

Accepted Answer

Directly proportional

Answer

Inversely proportional

Answer

Independent

Question 17

Which material conducts electricity well?

Accepted Answer

Copper

Answer

Plastic

Answer

Wood

Answer

Glass

Question 18

What is the effect of introducing a dielectric material between the plates of a capacitor?

Accepted Answer

Increases capacitance

Answer

Decreases capacitance

Question 19

What is the SI unit of electric charge?

Accepted Answer

Coulomb

Answer

Volt

Answer

Ampere

Answer

Watt

Question 20

According to Coulomb's law, which factor is the force between two point charges directly proportional to?

Accepted Answer

The product of the charges

Answer

The square of the distance between them

Answer

The sum of the charges

Answer

The difference in their charges

Question 21

What is the SI unit of electric charge?

Accepted Answer

Coulomb

Answer

Ampere

Answer

Volt

Answer

Ohm

Question 22

Consider two identical positive charges separated by a certain distance. If the distance between them is doubled, what effect will this have on the force between them?

Accepted Answer

The force decreases by a factor of 4

Answer

The force remains the same

Answer

The force increases by a factor of 4

Answer

The force decreases by a factor of 2

Question 23

Which of the following accurately describes electric fields?

Accepted Answer

They can exert forces on other charges

Answer

They are exclusively created by stationary charges

Answer

They always point away from positive charges

Answer

They are not influenced by other electric fields

Question 24

Which of the following materials exhibits good electrical conductivity?

Accepted Answer

Copper

Answer

Rubber

Answer

Plastic

Answer

Wood

Question 25

What is the primary function of a capacitor?

Accepted Answer

Storing electric charge

Answer

Regulating current flow

Answer

Amplifying signals

Answer

Converting AC to DC

Question 26

Which of the following accurately describes electric fields?

Accepted Answer

(A) Electric fields are generated by both stationary and moving charges.

Answer

(B) Electric fields are always parallel to equipotential surfaces.

Answer

(C) Electric fields are non-conservative in nature.

Answer

(D) None of the above

Question 27

The electric field intensity at a point 10 cm from a point charge is measured to be 100 N/C. What is the magnitude of the charge?

Accepted Answer

(B) 9.00 x 10^-12 C

Answer

(A) 8.85 x 10^-13 C

Answer

(C) 1.11 x 10^-11 C

Answer

(D) 8.00 x 10^-14 C

Question 28

Which material is a good conductor of electricity?

Accepted Answer

(C) Copper

Answer

(A) Plastic

Answer

(B) Wood

Answer

(D) Rubber

Question 29

How does electrostatic induction charge a conductor? Explain the role of electric fields in this process.

Accepted Answer

A positively charged object is brought near an uncharged conductor, inducing negative charges on the side closest to the object and positive charges on the opposite side.

Answer

The conductor is connected to a battery, allowing charges to flow from the battery to the conductor.

Answer

The conductor is rubbed with a material, transferring charges from the material to the conductor.

Answer

The conductor is placed in a magnetic field, causing charges to move within the conductor.

Question 30

What material allows electricity to flow through it easily?

Accepted Answer

Copper

Answer

Rubber

Answer

Glass

Answer

Wood

Question 31

What is the SI unit of electric charge?

Accepted Answer

Coulomb

Answer

Newton

Answer

Ampere

Answer

Volt

Question 32

Which of the following particles carries a positive electric charge?

Accepted Answer

Proton

Answer

Electron

Answer

Neutron

Answer

Photon

Question 33

According to Coulomb's law, how does the force (F) between two charged particles relate to the distance (d) between them?

Accepted Answer

F is inversely proportional to d squared

Answer

F is proportional to d

Answer

F is proportional to d squared

Answer

F is inversely proportional to d

Question 34

Which of the following factors does NOT affect the strength of an electric field created by a charge?

Accepted Answer

Shape of the charge

Answer

Magnitude of the charge

Answer

Distance from the charge

Answer

Material surrounding the charge

Question 35

What is the electric field strength at a point that is equidistant from two equal and opposite charges?

Accepted Answer

Zero

Answer

Non-zero

Answer

Cannot be determined without knowing the distance

Answer

Depends on the sign of the charges

Question 36

What is the potential difference between two points in an electric field?

Accepted Answer

Work done per unit charge in moving a charge between the points

Answer

Difference in electric field strength between the points

Answer

Time taken for a charge to move between the points

Answer

Distance between the points

Question 37

Which unit is used to measure electric potential?

Accepted Answer

Volt

Answer

Coulomb

Answer

Ampere

Answer

Joule

Question 38

How does the electric potential at a point due to a point charge relate to the charge?

Accepted Answer

Proportional to the charge

Answer

Inversely proportional to the charge

Answer

Proportional to the square of the charge

Answer

Independent of the charge

Question 39

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

Accepted Answer

Coulomb (C)

Answer

Ampere (A)

Answer

Volt (V)

Answer

Farad (F)

Question 40

Electric fields can be created by:

Accepted Answer

Both stationary and moving charges

Answer

Only stationary charges

Answer

Only moving charges

Question 41

A capacitor stores 100 μC of charge when connected to a 12 V battery. What is the capacitance of the capacitor?

Accepted Answer

8.33 μF

Answer

16.67 μF

Answer

25.00 μF

Answer

12.00 μF

Question 42

Which of the following is NOT a property of electric potential?

Accepted Answer

It is a vector quantity

Answer

It can be used to calculate the electric field

Answer

It is measured in volts

Answer

It is conservative

Question 43

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

Accepted Answer

Copper

Answer

Plastic

Answer

Rubber

Answer

Wood

Question 44

Which of the following statements about electric fields is accurate?

Accepted Answer

Electric fields originate from electric charges and exert forces on other charges.

Answer

Electric fields only exist in the presence of magnets.

Answer

Electric fields are always attractive.

Answer

Electric fields are visible to the naked eye.

Question 45

A positive charge is placed in an electric field. What is the expected behavior of the charge?

Accepted Answer

It accelerates in the direction of the field.

Answer

It remains stationary.

Answer

It moves randomly.

Answer

It accelerates in the opposite direction of the field.

Question 46

Which of the following materials has high electrical conductivity?

Accepted Answer

Copper

Answer

Rubber

Answer

Glass

Answer

Wood

Question 47

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

Accepted Answer

Radially outward

Answer

Radially inward

Answer

Random

Answer

Tangentially

Question 48

A neutral object is placed in an electric field. What is the net electric force acting on the object?

Accepted Answer

Zero

Answer

Equal to the force on the negative charges

Answer

Cannot be determined without knowing the material properties of the object

Answer

Equal to the force on the positive charges

Question 49

Two charged objects, one with a charge of +2 Coulombs and the other with a charge of -1 Coulomb, are placed 1 meter apart. What is the direction of the electric force between them?

Accepted Answer

Attractive, from the positive to the negative charge

Answer

Repulsive, from the negative to the positive charge

Answer

Zero, since the charges are equal in magnitude but opposite in sign

Question 50

Which of the following statements about electric fields is correct?

Accepted Answer

Electric fields are invisible regions of space around charged objects that exert forces on other charged objects.

Answer

Electric fields are created by magnetic fields and exert forces on other magnetic fields.

Answer

Electric fields only exist in a vacuum and cannot exist in air or other materials.

Question 51

A positively charged object is placed in a uniform electric field. What is the direction of the electric force acting on the object?

Accepted Answer

In the same direction as the electric field

Answer

Perpendicular to the direction of the electric field

Answer

Opposite to the direction of the electric field

Answer

The force is zero, as the object is in equilibrium

Question 52

Two point charges, each with a charge of +1 Coulomb, are placed 1 meter apart in a vacuum. What is the magnitude of the electric force between them, according to Coulomb's law?

Accepted Answer

9 x 10^9 Newtons

Answer

4.5 x 10^9 Newtons

Answer

18 x 10^9 Newtons

Answer

1 x 10^9 Newtons

Question 53

A charged object is moved from a point of high electric potential to a point of low electric potential. What happens to the object's potential energy?

Accepted Answer

It decreases

Answer

It remains constant

Answer

It increases

Answer

It becomes zero

Question 54

Which of the following factors influences the strength of the electric field created by a point charge?

Accepted Answer

Both the magnitude of the charge and the distance from the charge

Answer

Only the magnitude of the charge

Answer

Only the distance from the charge

Question 55

An electron, which has a negative charge, is released from rest in a uniform electric field. What happens to its speed and kinetic energy as it moves?

Accepted Answer

Its speed and kinetic energy both increase

Answer

Its speed and kinetic energy both remain constant

Answer

Its speed increases, but its kinetic energy remains constant

Answer

Its speed remains constant, but its kinetic energy increases

Question 56

A capacitor is a device that stores

Accepted Answer

Electric charge

Answer

Gravitational potential energy

Answer

Thermal energy

Answer

Magnetic energy

Question 57

A negatively charged object is brought near a neutral object. What happens to the neutral object?

Accepted Answer

The neutral object becomes polarized, with the side closest to the charged object developing a positive charge

Answer

The neutral object remains neutral

Answer

The neutral object becomes positively charged

Question 58

Two point charges, one with a charge of +4 Coulombs and the other with a charge of -2 Coulombs, are placed 2 meters apart. If the distance between them is doubled, what happens to the electric force between them, according to Coulomb's law?

Accepted Answer

It decreases to one-fourth of its original value

Answer

It decreases to one-half of its original value

Answer

It remains the same

Answer

It doubles