Question 1

Choose the correct statement concerning electric field lines:

Accepted Answer

A)   field lines may cross
B)   field lines are close together where the field is large
C)   field lines point away from negatively charged particle
D)   a point charge particle released from rest moves along a field line
E)   none of these are correctF) C) and E)
G) A) and E)

Question 2

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

A)   I only
B)   I and II only
C)   III only
D)   I and III only
E)   II onlyF) B) and D)
G) All of the above

Question 3

As used in the definition of electric field, a "test charge":

Accepted Answer

A)   has zero charge
B)   has charge of magnitude 1 C
C)   has charge of magnitude 1.6 *10-19 C
D)   must be an electron
E)   none of the aboveF) A) and E)
G) A) and B)

Question 4

Two point particles,with charges of q1 and q2, are placed a distance r apart. The electric field is zero at a point P between the particles on the line segment connecting them. We conclude that:

Accepted Answer

A)   q1 and q2 must have the same magnitude and sign
B)   P must be midway between the particles
C)   q1 and q2 must have the same sign but may have different magnitudes
D)   q1 and q2 must have equal magnitudes and opposite signs
E)   q1 and q2 must have opposite signs and may have different magnitudesF) A) and D)
G) D) and E)

Question 5

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

Accepted Answer

A)   200 N in the positive x direction
B)   200 N in the negative x direction
C)   3.2 *10-17 m/s2, in the positive x direction
D)   3.2 * 10-17 m/s2, in the negative x direction
E)   0F) B) and C)
G) A) and B)

Question 6

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

Accepted Answer

A)   everywhere
B)   nowhere
C)   only at the center of the shell
D)   only inside the shell
E)   only outside the shellF) A) and B)
G) None of the above

Question 7

The diagrams below depict four different charge distributions. The charged particles are all the same distance from the origin. The electric field at the origin:

Accepted Answer

A)   is greatest for situation 1
B)   is greastest for situation 3
C)   is zero for situation 4
D)   is downward for situation 1
E)   is downward for situation 3F) B) and C)
G) C) and D)

Question 8

Let k denote 1/4  π\piπε\varepsilonε 0. The magnitude of the electric field at a distance r from an isolated point charge q is:

Accepted Answer

A)   kq/r
B)   kr/q
C)   kq/r3
D)   kq/r2
E)   kq2/r2 F) None of the above
G) A) and E)

Question 9

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

A)    ↑\uparrow↑ 
B)    ↓\downarrow↓ 
C)    ←\leftarrow←  
D)    →\rightarrow→ 
E)    F) C) and D)
G) B) and D)

Exam 22: Electric Fields

The diagrams below depict four different charge distributions. The charged particles are all the same distance from the origin. The electric field at the origin:

Correct Answer
verified

Let k denote 1/4 $\pi$ $\varepsilon$ ₀. The magnitude of the electric field at a distance r from an isolated point charge q is:

Correct Answer
verified

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

Correct Answer
verified

Choose the correct statement concerning electric field lines:

Correct Answer
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Correct Answer
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Two point particles,with charges of q₁ and q₂, are placed a distance r apart. The electric field is zero at a point P between the particles on the line segment connecting them. We conclude that:

Correct Answer
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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?

Correct Answer
verified

As used in the definition of electric field, a "test charge":

Correct Answer
verified

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

Correct Answer
verified

Exam 22: Electric Fields

The diagrams below depict four different charge distributions. The charged particles are all the same distance from the origin. The electric field at the origin:

Correct AnswerverifiedShow Answer

Let k denote 1/4 π\piπε\varepsilonε 0. The magnitude of the electric field at a distance r from an isolated point charge q is:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Choose the correct statement concerning electric field lines:

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

Two point particles,with charges of q1 and q2, are placed a distance r apart. The electric field is zero at a point P between the particles on the line segment connecting them. We conclude that:

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

As used in the definition of electric field, a "test charge":

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answer
verified

Let k denote 1/4 $\pi$ $\varepsilon$ ₀. The magnitude of the electric field at a distance r from an isolated point charge q is:

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Two point particles,with charges of q₁ and q₂, are placed a distance r apart. The electric field is zero at a point P between the particles on the line segment connecting them. We conclude that:

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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