AnswersCrowley Credit Recovery Physics BElectric Fields

Electric Fields Answers

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1
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An electric field is represented by the force on which particle?

A
a neutron
B
a neutron
C
a dipole
D
a dipole
E
a negative test charge
F
a negative test charge
G
a positive test charge
H
a positive test charge
2
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The strength of the electric field 0.5 m from a 6 µC charge is _______ N/C. (Use k = 8.99 × 109 N• and round answer to the nearest whole number.)

Question illustration
A
215760
B
539400
C
697976
D
512356
3

The diagram shows the electric field in the vicinity of a charge.

Question illustration
A
W
B
X
C
Y
D
Z
4

Which statements are correct? Check all that apply.

A
Charge Q is positive.
B
Charge Q is negative.
C
The electric field is uniform.
D
The electric field is nonuniform.
E
If charge A is negative, it moves away from charge Q.
F
If charge A is positive, it moves away from charge Q.
5

An electric field is represented by the force on which particle?

A
a neutron
B
a dipole
C
a negative test charge
D
a positive test charge
6

An electric field around two charged objects is shown.

Question illustration
A
X: negativeY: positive
B
X: positiveY: positive
C
X: negativeY: negative
D
X: positiveY: negative
7

A negative test charge experiences a force to the right as a result of an electric field. Which is the best conclusion to draw based on this description?

A
The electric field points to the left because the force on a negative charge is opposite to the direction of the field.
B
The electric field points to the right because the force on a negative charge is in the same direction as the field.
C
No conclusion can be drawn because the sign of the charge creating the field is unknown.
D
No conclusion can be drawn because the amount of charge on the test charge is unknown.
8

The diagram shows a charge moving into an electric field.

Question illustration
A
W
B
X
C
Y
D
Z
9

A pair of opposite electric charges of equal magnitude is called a(n)

A
dipole.
B
point charge.
C
electric field.
D
field line.
10

What is the strength of the electric field 0.020 m from a 12 µC charge? (Use k=)

Question illustration
A
5.4 × 106 N/C
B
2.7 × 108 N/C
C
5.4 × 1012 N/C
D
2.7 × 1014 N/C
11

A negative test charge experiences a force to the right as a result of an electric field. Which is the best conclusion to draw based on this description?

A
The electric field points to the left because the force on a negative charge is opposite to the direction of the field.
B
The electric field points to the right because the force on a negative charge is in the same direction as the field.
C
No conclusion can be drawn because the sign of the charge creating the field is unknown.
D
No conclusion can be drawn because the amount of charge on the test charge is unknown.
12

What is the direction of the electric field at a point directly to the left of a positive charge, Q?

A
up
B
down
C
left
D
right
13

Which best describes the electric field created by a positive charge?

A
It circles clockwise around the charge.
B
It circles counterclockwise around the charge.
C
Its rays point away from the charge.
D
Its rays point toward the charge.
14

What formula gives the strength of an electric field, E, at a distance from a known source charge?

A
E =
Option A
B
E =
Option B
C
E =
Option C
D
E =
Option D
15

A source charge generates an electric field of 4286 N/C at a distance of 2.5 m. What is the magnitude of the source charge? (Use k=)

Question illustration
A
1.2 µC
B
3.0 µC
C
1.2 C
D
3.0 C
16

Which statements about electric field lines are correct? Check all that apply.They point toward a positive charge.They point toward a negative charge.They point away from a positive charge.They point away from a negative charge.They cross over one another between charges.They never cross.

A
They point toward a positive charge.
B
They point toward a negative charge.
C
They point away from a positive charge.
D
They point away from a negative charge.
E
They cross over one another between charges.
F
They never cross.
17

The diagram shows the electric field in the vicinity of a charge.

Question illustration
A
W
B
X
C
Y
D
Z
18

Liana draws a diagram to show the direction of the electric force acting on a charged particle in a uniform electric field.

Question illustration
A
changing the charge to negative
B
making the field lines point down
C
changing the force to point right
D
removing the force arrow
19

A charge of +0.08 C moves to the right due to a 4 N force exerted by an electric field. What is the magnitude and direction of the electric field?

A
0.32 N/C left
B
0.32 N/C right
C
50 N/C left
D
50 N/C right
20

Electric field lines can never cross. What would crossed electric field lines indicate?

A
a field pointing in two directions
B
an attractive force on a charge
C
a nonuniform area of the field
D
a place where the field strength is zero

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