Modern Physics Quizz Course 6

Electric field lines commence from:

• A. Negative charges only.

• B. Positive charges and extend to infinity.

• C. Both positive and negative charges equally.

• D. Neutral charges.

Gauss's Law relates:

• A. The electric flux through a closed surface to the charge outside the surface.

• B. The magnetic field around a conductor to the current through it.

• C. The electric flux through a closed surface to the charge enclosed by that surface.

• D. The potential difference across a capacitor to the charge on it.

An electric dipole consists of:

• A. Two positive charges only.

• B. Two negative charges only.

• C. One positive and one negative charge of equal magnitude.

• D. Two charges of the same sign but different magnitudes.

The electric potential energy between two charges is directly proportional to:

• A. The product of the charges.

• B. The square of the distance between the charges.

• C. The inverse of the distance between the charges.

• D. The sum of the charges.

Which of the following is not a method for calculating electric fields?

• A. Using Coulomb's law for point charges.

• B. Applying Gauss's law for symmetrical charge distributions.

• C. Measuring the potential difference and dividing by distance.

• D. Calculating the area under a force vs. distance graph.

Gauss's Law is particularly useful for calculating electric fields of:

• A. Irregularly shaped objects.

• B. Objects with uniform charge distribution.

• C. Highly symmetrical charge distributions.

• D. Single point charges only.

What is the unit of electric field strength?

• A. Joule (J)

• B. Coulomb (C)

• C. Newton per Coulomb (N/C)

• D. Ampere (A)

Which statement about electric field lines is false?

• A. They can never cross each other.

• B. Their density indicates the field's strength.

• C. They represent the velocity of charged particles.

• D. They terminate at negative charges.

The electric field E at a given point in space is defined as:

• A. The product of force and charge.

• B. The force per unit charge.

• C. The potential energy per unit charge.

• D. The displacement per unit charge.

The work done in moving a charge between two points in an electric field is equal to:

• A. The difference in electric potential energy between the points.

• B. The product of charge and electric field strength.

• C. The sum of electric potential energies at the points.

• D. The electric flux through the area enclosed by the points.