Answers350CR Integrated ScienceEnergy Transformations

Energy Transformations — Unit test Answers

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What is the equation for calculating the electrical force, Fe, between two charges?

A
Fe = k
Option A
B
Fe =
Option B
C
Fe = k
Option C
D
Fe = k
Option D
2
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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
3

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.
4

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
5

A circuit featuring multiple paths through which current can flow is best classified into which category?

A
a series circuit
B
an open circuit
C
a parallel circuit
D
a short circuit
6

The area around a charged object that can exert a force on other charged objects is a(n) _________.

A
electric field
B
field line
C
conductor
D
electric potential energy
8

How are electric potential difference and electric potential energy related?

A
Electric potential difference is the charge divided by the difference in electric potential energy.
B
Electric potential energy is the charge divided by the electric potential difference.
C
Electric potential difference is the difference in electric potential energy divided by the charge.
D
Electric potential energy is the electric potential difference divided by the charge.
9

Suchita sees this symbol shown in a circuit diagram.

Question illustration
A
to measure current
B
to measure voltage
C
to provide electrical energy
D
to use electrical energy
10

What is the value of the charge that experiences a force of 2.4 × 10–3 N in an electric field of 6.8 × 10–5 N/C?

A
1.6 × 10–7 C
B
2.5 × 10–3 C
C
2.8 × 10–3 C
D
3.5 × 101 C
12

What is the electric field between two parallel plates if the electric potential difference between the plates is 24 V and the plates are 65 mm apart?

A
0.0027 N/C
B
1.6 N/C
C
369 N/C
D
1560 N/C
13

Humberto builds two circuits using identical components.Circuit 1: A series circuit with three lightbulbs Circuit 2: A parallel circuit with three lightbulbsHe then adds two more lightbulbs in a series with the bulbs in circuit 1 and two more lightbulbs on new branches in parallel with each bulb in circuit 2.

A
All bulbs in circuit 1 will shine at the same brightness as the original bulbs, while all bulbs in circuit 2 will be dimmer than the original bulbs.
B
All bulbs in circuit 1 will shine more dimly than the original bulbs, while all bulbs in circuit 2 will have the same brightness as the original bulbs.
C
The original bulbs will remain at their original brightness, but the bulbs added to circuit 1 will be dimmer than the bulbs added to circuit 2.
D
The original bulbs will remain at their original brightness, but the bulbs added to circuit 1 will be brighter than the bulbs added to circuit 2.
14

What is the electric potential energy of a charge that experiences a force of 3.6 × 10–4 N when it is 9.8 × 10–5 m from the source of the electric field?

A
3.5 × 10–8 J
B
4.6 × 10–4 J
C
2.7 × 10–1 J
D
3.7 × 100 J
15

A circuit has a current of 3.6 A and a resistance of 5.0 Ω.What is the voltage applied to the circuit?

A
0.72 V
B
1.4 V
C
8.6 V
D
18 V
16

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.
17

In a movie, the heroine saves the day by cutting a wire before the time runs out on a timer.

A
She changed a short circuit to an open circuit.
B
She changed an open circuit to a closed circuit.
C
She changed a closed circuit to an open circuit.
D
She changed a closed circuit to a short circuit.
18

Maria makes a graphic organizer to compare open, closed, and short circuits. She adds the labels shown.Label 1: Current flows in the circuit.Label 2: This forms when a bulb burns out.

Question illustration
A
Label 1: ZLabel 2: X
B
Label 1: YLabel 2: W
C
Label 1: XLabel 2: Y
D
Label 1: YLabel 2: Z
19

How does the electrical force relate to the distance between two charged objects?

A
It is inversely proportional to the square of the distance.
B
It is directly proportional to the square of the distance.
C
It is inversely proportional to the distance.
D
It is directly proportional to the distance.
20

One charge is decreased to one-third of its original value, and a second charge is decreased to one-half of its original value.

A
It will increase to six times the original force.
B
It will increase to thirty-six times the original force.
C
It will decrease to one-sixth the original force.
D
It will decrease to one-thirty-sixth the original force.
21

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

A
dipole.
B
point charge.
C
electric field.
D
field line.
22

Which equation is used to calculate the electric potential in an electric field from a point charge?

A
V = k
Option A
B
V = k
Option B
C
V =
Option C
D
V =
Option D

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