AnswersDSD-CR-Physics-Term 4Electric Fields

Ohm's Law Answers

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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
2
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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
3

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.
4

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

Question illustration
A
W
B
X
C
Y
D
Z
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

The diagram shows a charge moving into an electric field.

Question illustration
A
W
B
X
C
Y
D
Z
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

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

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 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

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