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Electric Fields Answers

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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.
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

A source charge generates an electric field of 1236 N/C at a distance of 4 m. What is the magnitude of the source charge? (Use k=)

Question illustration
A
2.2 µC
B
680 µC
C
2.2 C
D
680 C
4

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
5

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
6

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
7

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
8

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
9

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
10

What is the direction of the electric field at a point directly below a negative charge, Q?

A
up
B
down
C
left
D
right

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