AnswersBHS-Physics B-CRUnit Test

Electric Fields Answers

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1
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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.
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 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.
4

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
5

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
6

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

Question illustration
A
W
B
X
C
Y
D
Z
7

The area around a charged object that can exert a force on other charged objects is an electric .

Answer not available
8

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
9

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
10

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

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