Question 1

An electron traveling north enters a region where the electric field is uniform and points west. The electron:

Accepted Answer

When an electron, which is negatively charged, enters a region with an electric field pointing west, it will experience a force in the direction opposite to the field (since the electric field direction is defined as the direction a positive charge would move). Therefore, the electron will veer east.

Question 2

The purpose of Milliken's oil drop experiment was to determine:

Accepted Answer

Milliken's oil drop experiment was designed to measure the charge of an electron by observing the behavior of tiny oil droplets between two electric plates.

Question 3

Positive charge +Q is uniformly distributed on the upper half of a semicircular rod and negative charge -Q is uniformly distributed on the lower half. What is the direction of the electric field at point P, the center of the semicircle?

Accepted Answer

At point P, the electric field due to the positive charge and negative charge will be in opposite directions. The direction of electric field due to positive charge is radial and pointing away from the center of the semicircle. The direction of electric field due to negative charge is also radial, but pointing towards the center of the semicircle. At the center of the semicircle, these two electric fields cancel each other out and result in a net electric field of zero.

Since the electric field lines are continuous, they must be tangent to the semicircle at point P. The only option that shows an electric field direction that is tangent to the semicircle at point P is option B: F1F1F1S1F1F1F10.

Question 4

An electron traveling north enters a region where the electric field is uniform and points north. The electron:

Accepted Answer

Since the electric field is pointing north and the electron has a negative charge, the direction of the force on the electron will be southward. This force will cause the electron to slow down as it moves northward. Therefore, choice B is correct. Choices A, C, D, and E are all incorrect.

Question 5

Two charged point particle are located at two vertices of an equilateral triangle and the electric field is zero at the third vertex. We conclude:

Accepted Answer

The answer of Two charged point particle are located at...

Question 6

A cylinder has a radius of 2.1 cm and a length of 8.8 cm. Total charge 6.1 *10^-⁷ C is distributed uniformly throughout. The volume charge density is:

Accepted Answer

The answer of A cylinder has a radius of 2.1...

Question 7

The magnitude of the force of a 400-N/C electric field on a 0.02-C point charge is:

Accepted Answer

The magnitude of the force on a point charge in an electric field is given by F = qE, where q is the charge and E is the electric field strength. In this case, q = 0.02 C and E = 400 N/C, so F = (0.02 C)(400 N/C) = 8.0 N.

Question 8

A 200-N/C electric field is in the positive x direction. The force on an electron in this field is:

Accepted Answer

The force on a charge in an electric field is given by F = qE. For an electron, q = -1.6 x 10^-19 C. Thus, F = (-1.6 x 10^-19 C)(200 N/C) = -3.2 x 10^-17 N, which is in the negative x direction.

Question 9

Two point particles, with the same charge, are located at two vertices of an equilateral triangle. A third charged particle is placed so the electric field at the third vertex is zero. The third particle must:

Accepted Answer

The answer of Two point particles, with the same charge,...

Question 10

Positive charge +Q is uniformly distributed on the upper half of a rod and a negative charge -Q is uniformly distributed on the lower half. What is the direction of the electric field at point P, on the perpendicular bisector of the rod?

Accepted Answer

The electric field due to each half of the rod is along the perpendicular bisector towards the other side. Therefore, the total electric field at point P is downwards, as the negative charge dominates the positive charge. Thus, the correct choice is option B where the arrow points downwards.

Question 11

A charged particle is placed in an electric field that varies with location. No force is exerted on this charge:

Accepted Answer

If no force is exerted on the charged particle, then by definition, the electric field must be zero at the location of the particle. This is because the force on a charged particle in an electric field is given by F = qE, where q is the charge of the particle and E is the electric field. So if there is no force, either q = 0 or E = 0. But if q is not zero, then the only way for there to be no force is for E to be zero. Therefore, the correct choice is A.

Question 12

Two point particles, one with charge +8 *10^-⁹ C and the other with charge-2 *10^-⁹ C, are separated by 4 m. The electric field in N/C midway between them is:

Accepted Answer

The answer of Two point particles, one with charge +8...

Question 13

A spherical shell has an inner radius of 3.7 cm and an outer radius of 4.5 cm. If charge is distributed uniformly throughout the shell with a volume density of 6.1*10^-⁴ C/m³ the total charge is:

Accepted Answer

The answer of A spherical shell has an inner radius...

Question 14

A total charge of 6.3 *10^-⁸ C is distributed uniformly throughout a 2.7-cm radius sphere. The volume charge density is:

Accepted Answer

The answer of A total charge of 6.3 *10^-⁸ C...

Question 15

The electric field due to a uniform distribution of charge on a spherical shell is zero:

Accepted Answer

The electric field due to a uniform distribution of charge on a spherical shell is zero only inside the shell, according to Gauss's law. This is because the electric field lines do not penetrate into the enclosed space, effectively canceling out any net electric field within the shell.

Question 16

The diagram shows two identical particles, each with positive charge Q. The electric field at point P on the perpendicular bisector of the line joining them is:

Accepted Answer

The answer of The diagram shows two identical particles, each...

Question 17

An electric dipole consists of a particle with a charge of +6 * 10^-⁶ C at the origin and a particle with a charge of -6*10^-⁶ C on the x axis at x = 3 *10^-³ m. Its dipole moment is:

Accepted Answer

The dipole moment is given by the formula p=qd, where q is the charge and d is the displacement vector from the negative to the positive charge. In this case, q=6×10^(-6) C and d=3m i (where i is the unit vector in the x direction). Therefore, p=(6×10^(-6) C)(3m i)=18×10^(-6) C m i. This means that the dipole moment is in the negative x direction, since the negative charge is closer to the origin. Therefore, choice B is correct.

Question 18

Two point charges are arranged as shown. In which region could a third charge +1 C be placed so that the net electrostatic force on it is zero?

Accepted Answer

The answer of Two point charges are arranged as shown....

Question 19

Charge is placed on the surface of a 2.7-cm radius isolated conducting sphere. The surface charge density is uniform and has the value 6.9 *10^-⁶ C/m². The total charge on the sphere is:

Accepted Answer

The answer of Charge is placed on the surface of...

Question 20

Positive charge Q is uniformly distributed on a semicircular rod. What is the direction of the electric field at point P, the center of the semicircle?

Accepted Answer

The answer of Positive charge Q is uniformly distributed on...

Quiz 22: Electric Fields

An electron traveling north enters a region where the electric field is uniform and points west. The electron:

The purpose of Milliken's oil drop experiment was to determine:

An electron traveling north enters a region where the electric field is uniform and points north. The electron:

Two charged point particle are located at two vertices of an equilateral triangle and the electric field is zero at the third vertex. We conclude:

A cylinder has a radius of 2.1 cm and a length of 8.8 cm. Total charge 6.1 *10^-⁷ C is distributed uniformly throughout. The volume charge density is:

The magnitude of the force of a 400-N/C electric field on a 0.02-C point charge is:

A 200-N/C electric field is in the positive x direction. The force on an electron in this field is:

Two point particles, with the same charge, are located at two vertices of an equilateral triangle. A third charged particle is placed so the electric field at the third vertex is zero. The third particle must:

A charged particle is placed in an electric field that varies with location. No force is exerted on this charge:

Two point particles, one with charge +8 10^-⁹ C and the other with charge-2 10^-⁹ C, are separated by 4 m. The electric field in N/C midway between them is:

A spherical shell has an inner radius of 3.7 cm and an outer radius of 4.5 cm. If charge is distributed uniformly throughout the shell with a volume density of 6.1*10^-⁴ C/m³ the total charge is:

A total charge of 6.3 *10^-⁸ C is distributed uniformly throughout a 2.7-cm radius sphere. The volume charge density is:

The electric field due to a uniform distribution of charge on a spherical shell is zero:

An electric dipole consists of a particle with a charge of +6 * 10^-⁶ C at the origin and a particle with a charge of -610^-⁶ C on the x axis at x = 3 10^-³ m. Its dipole moment is:

Two point charges are arranged as shown. In which region could a third charge +1 C be placed so that the net electrostatic force on it is zero?

Charge is placed on the surface of a 2.7-cm radius isolated conducting sphere. The surface charge density is uniform and has the value 6.9 *10^-⁶ C/m². The total charge on the sphere is:

Quiz 22: Electric Fields

An electron traveling north enters a region where the electric field is uniform and points west. The electron:

The purpose of Milliken's oil drop experiment was to determine:

Positive charge +Q is uniformly distributed on the upper half of a semicircular rod and negative charge -Q is uniformly distributed on the lower half. What is the direction of the electric field at point P, the center of the semicircle?

An electron traveling north enters a region where the electric field is uniform and points north. The electron:

Two charged point particle are located at two vertices of an equilateral triangle and the electric field is zero at the third vertex. We conclude:

A cylinder has a radius of 2.1 cm and a length of 8.8 cm. Total charge 6.1 *10-7 C is distributed uniformly throughout. The volume charge density is:

The magnitude of the force of a 400-N/C electric field on a 0.02-C point charge is:

A 200-N/C electric field is in the positive x direction. The force on an electron in this field is:

Two point particles, with the same charge, are located at two vertices of an equilateral triangle. A third charged particle is placed so the electric field at the third vertex is zero. The third particle must:

Positive charge +Q is uniformly distributed on the upper half of a rod and a negative charge -Q is uniformly distributed on the lower half. What is the direction of the electric field at point P, on the perpendicular bisector of the rod?

A charged particle is placed in an electric field that varies with location. No force is exerted on this charge:

Two point particles, one with charge +8 *10-9 C and the other with charge-2 *10-9 C, are separated by 4 m. The electric field in N/C midway between them is:

A spherical shell has an inner radius of 3.7 cm and an outer radius of 4.5 cm. If charge is distributed uniformly throughout the shell with a volume density of 6.1*10-4 C/m3 the total charge is:

A total charge of 6.3 *10-8 C is distributed uniformly throughout a 2.7-cm radius sphere. The volume charge density is:

The electric field due to a uniform distribution of charge on a spherical shell is zero:

The diagram shows two identical particles, each with positive charge Q. The electric field at point P on the perpendicular bisector of the line joining them is:

An electric dipole consists of a particle with a charge of +6 * 10-6 C at the origin and a particle with a charge of -6*10-6 C on the x axis at x = 3 *10-3 m. Its dipole moment is:

Two point charges are arranged as shown. In which region could a third charge +1 C be placed so that the net electrostatic force on it is zero?

Charge is placed on the surface of a 2.7-cm radius isolated conducting sphere. The surface charge density is uniform and has the value 6.9 *10-6 C/m2. The total charge on the sphere is:

Positive charge Q is uniformly distributed on a semicircular rod. What is the direction of the electric field at point P, the center of the semicircle?

A cylinder has a radius of 2.1 cm and a length of 8.8 cm. Total charge 6.1 *10^-⁷ C is distributed uniformly throughout. The volume charge density is:

Two point particles, one with charge +8 10^-⁹ C and the other with charge-2 10^-⁹ C, are separated by 4 m. The electric field in N/C midway between them is:

A spherical shell has an inner radius of 3.7 cm and an outer radius of 4.5 cm. If charge is distributed uniformly throughout the shell with a volume density of 6.1*10^-⁴ C/m³ the total charge is:

A total charge of 6.3 *10^-⁸ C is distributed uniformly throughout a 2.7-cm radius sphere. The volume charge density is:

An electric dipole consists of a particle with a charge of +6 * 10^-⁶ C at the origin and a particle with a charge of -610^-⁶ C on the x axis at x = 3 10^-³ m. Its dipole moment is:

Charge is placed on the surface of a 2.7-cm radius isolated conducting sphere. The surface charge density is uniform and has the value 6.9 *10^-⁶ C/m². The total charge on the sphere is: