# Physics Quiz: Can You Pass?

8 Questions | Attempts: 395  Settings  In Physics, electrons are elements, which exist in physical state that result to among other things electromagnetic charges. How good are you with Physics? Find out below and compare your results with others. All the best.

• 1.
Two positive point charges are separated by a distance R.  If the distance between the charges is reduced to R/2, what happens to the total electric potential energy of the system?
• A.

The total electric potential energy is doubled.

• B.

The total electric potential energy remains the same.

• C.

The total electric potential energy increases by a factor of 4.

• D.

The total electric potential energy is reduced to one-half of its original value.

• E.

The total electric potential energy is reduced to one-fourth of its original value.

• 2.
Which one of the following statements best explains why it is possible to define an electrostatic potential in a region of space that contains an electrostatic field?
• A.

Work must be done to bring two positive charges closer together.

• B.

Like charges repel one another and unlike charges attract one another.

• C.

A positive charge will gain kinetic energy as it approaches a negative charge.

• D.

The work required to bring two charges together is independent of the path taken.

• E.

A negative charge will gain kinetic energy as it moves away from another negative charge.

• 3.
Complete the following statement: The electron volt is a unit of
• A.

energy.

• B.

Electric field strength.

• C.

Electric force.

• D.

Electric potential difference.

• E.

Electric power.

• 4.
Which one of the following statements is true concerning the work done by an external force in moving an electron at constant speed between two points in an electrostatic field?
• A.

The work done is always zero joules.

• B.

The work done is always positive.

• C.

The work done only depends on the speed of the electron.

• D.

The work done depends on the total distance covered.

• E.

The work done depends only on the displacement of the electron.

• 5.
Two charged particles A and B are located near one another.  Both the magnitude and direction of the force that particle A exerts on particle B is independent of
• A.

The sign of charge B.

• B.

The sign of charge A.

• C.

The distance between A and B.

• D.

the magnitude of the charge on B.

• E.

The magnitude and direction of the force are dependent on all of the choices.

• 6.
Two uncharged, conducting spheres, A and B, are held at rest on insulating stands and are in contact.  A positively charged rod is brought near sphere A as suggested in the figure.  While the rod is in place, someone moves sphere B away from A.  How will the spheres be charged, if at all?
• A.

Sphere A: Positive Sphere B: Positive

• B.

Sphere A: Positive Sphere B: Negative

• C.

Sphere A: Negative Sphere B: Positive

• D.

Sphere A: Negative Sphere B: Negative

• E.

Sphere A: Zero Sphere B: Zero

• 7.
Complete the following statement: When a glass rod is rubbed with silk cloth, the rod becomes positively charged as
• A.

Positive charges are transferred from the silk to the rod.

• B.

Negative charges are transferred from the rod to the silk.

• C.

Positive charges are created on the surface of the rod.

• D.

negative charges are transferred from the silk to the rod.

• E.

positive charges are transferred from the rod to the silk.

• 8.
Three objects have a net charge.  Objects A and B attract one another.  Objects B and C also attract one another, but objects A and C repel one another.  Which one of the following table entries is a possible combination of the signs of the net charges on these three objects?
• A.

A: + B: + C: -

• B.

A: - B: + C: +

• C.

A: + B: - C: -

• D.

A: - B: + C: -

• E.

A: - B: - C: +

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