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Electrostatics and Circuits

Total questions: 45

Worksheet time: 38mins

Name
Class
Date
1.

What would increase the voltage of this circuit?

a)

Decreasing voltage

b)

Decreasing current, constant resistance

c)

Increasing current, constant resistance

d)

Decreasing resistance, constant current

2.

Which of the following is true about a parallel circuit?

a)

Voltage drops occur in a parallel circuit.

b)

If one part of a parallel circuit goes out, the entire circuit goes out.

c)

Current splits in a parallel circuit.

d)

Resistance is higher in a parallel circuit.

3.

Which of the following is the most dangerous part of a circuit? (aka, what kills you bad?)

a)

High voltage

b)

High current

c)

High resistance

d)

High power

4.

Which of the following light bulbs will have the lowest resistance?

a)

40 W

b)

100 W

c)

150 W

d)

200 W

5.

Which of the following would not be a good conductive material for a wire?

a)

Gold

b)

Platinum

c)

Copper

d)

Rubber

6.

In order to avoid being shocked by a live circuit, you should only touch...

a)

insulated switches

b)

bare wire

c)

power terminal

d)

voltage source

7.

A 12 V battery is connected to three 4 ohm resistors in series. What is the total current flowing through the circuit?

a)

1 ampere

b)

3 amperes

c)

48 amperes

d)

144 amperes

8.

If the voltage supply for this circuit is 5 V, what is the power output of the circuit?

a)

0.25 W

b)

0.83 W

c)

0.4 W

d)

30 W

9.

The current supplied by a battery is 0.17 amps. What would the voltage drop be across a 20 ohm resistor?

a)

1.7 V

b)

3.4 V

c)

5 V

d)

30 V

10.

One light in the library goes out, and the entire school goes out. This would prove that the school is wired in...

a)

series

b)

parallel

c)

reverse

d)

separate circuits

11.

Which direction does charge flow in a circuit?

a)

Negative to positive

b)

Positive to negative

c)

in a zigzag

d)

what

12.

In a series circuit with two resistors, which of the following does not change?

a)

Resistance

b)

Voltage

c)

Current

d)

Power

13.

In a parallel circuit with two resistors, which of the following does not change?

a)

Current

b)

Resistance

c)

Voltage

d)

Power

14.

What is current measured in?

a)

volts

b)

amperes

c)

ohms

d)

watts

15.

What is resistance measured in?

a)

ohms

b)

amperes

c)

volts

d)

watts

16.
This is an example of a _______ circuit
a)
open
b)
series
c)
parallel
d)
square
17.
This is an example of a ______ circuit
a)
Series
b)
Parallel
c)
Open
d)
Dihexihedral
18.
A material in which electrons are able to move easily
a)
Circuit
b)
Insulator 
c)
Resistance 
d)
Conductor 
19.
what is this symbol for?
a)
light bulb
b)
switch
c)
battery
d)
resistor
20.

Wood is a _____?

a)

conductor

b)

insulator

21.
What 'flows' in a wire?
a)
Protons
b)
Neutrons
c)
Atoms
d)
Electrons
22.
Parallel circuits are
a)
a circuit that has only one path for current to travel
b)
has more than one path for current to travel
c)
a circuit that does not allow electricity to travel through it
d)
magnets that cause electric current
23.

Which of the following circuit diagrams is an open circuit?

a)
b)
c)
d)
24.

What is the current drawn by a 5 ohm resistor when it is connected to a 1.5 V battery?

a)

7.5 amperes

b)

3.33 amperes

c)

0.3 amperes

d)

6.5 amperes

25.

What is the current drawn by a 10 ohm resistor when it is connected to a 12 V car battery?

a)

22 amperes

b)

1.2 amperes

c)

0.83 amperes

d)

120 amperes

26.

What is the resistance of an object that draws 0.24 A when connected to a 120 volt circuit?

a)

0.024 ohms

b)

28.8 ohms

c)

124 ohms

d)

500 ohms

27.

Which of the following devices measures current in an electric circuit?

a)

an ammeter

b)

an ohmmeter

c)

a voltage meter

d)

a resistor

28.
If two balloons have the same charge, what will happen if you place them close to each other?
a)
Nothing
b)
They will be attracted
c)
They will pop
d)
They will push each other away.
29.
Electric charges that are alike _______ each other.
a)
Attract
b)
Repel
30.
The SI unit of charge is
a)
the ampere
b)
the newton
c)
the coulomb
d)
the joule
31.
The charge of an electron is 
a)
positive. 
b)
negative. 
c)
Electrons have no charge
32.
An atom loses an electron.  What type of charge does it have now?
a)
positive
b)
negative
33.

When an object gains electrons it becomes __________

a)

Neutral

b)

Positively charged

c)

Negatively charged

34.

What are the best conductors?

a)

metals (copper, silver, and aluminum)

b)

plastics, ceramics, rubber, wool, wood and glass

c)

silicon, computer chips and electronic circuits

35.

What is an insulator?

a)

material that cannot move electrical charges

b)

materials through which heat and electric charge can flow easily

c)

material than can move electrical charges as well as prevent the flow of electrical charges

36.

What are the best insulators?

a)

metals (copper, silver, and aluminum)

b)

plastics, ceramics, rubber, wool, wood and glass

c)

silicon, computer chips and electronic circuits

37.

In an electric field, Point A has more electric field lines moving through it than Point B. Which is true?

a)

Point A and Point B will have the same Force, but A will be farther away

b)

Point A will have a stronger Force, Point B is farther away and has a weaker Force

c)

Point A and Point B will have the same Force, but B will be farther away

d)

Point B will have a stronger Force, Point A is farther away and has a weaker Force

38.

Label the charges respectively:

a)

+; +

b)

+; -

c)

-; -

d)

-; +

39.

Label the charges respectively:

a)

+; +

b)

+; -

c)

-; -

d)

-; +

40.

Label the charges respectively:

a)

+; +

b)

+; -

c)

-; -

d)

-; +

41.

What is the missing charge?

a)

positive +

b)

negative -

c)

impossible to tell

42.
During a physics lab, a plastic strip was rubbed with cotton and became positively charged. The correct explanation for why the plastic strip becomes positively charged is that ...
a)
the plastic strip acquired extra protons from the cotton.
b)
the plastic strip acquired extra protons from the charging process 
c)
protons were created as the result of the charging process
d)
the plastic strip lost electrons to the cotton during the charging process 
43.
Electrostatic force F exists between two point charges. If the both charges are doubled, the force between the charges will be
a)
F
b)
4F
c)
2F
d)
F/4
44.
An electrostatic force of magnitude F exists between two metal spheres having identical charge q. The distance between their centers is r. Which combination of changes would produce no change in the electrostatic force between the spheres?
a)
doubling q on both spheres while halving r
b)
doubling q on one sphere while halving r
c)
doubling q on one sphere while doubling r
d)
doubling q on both spheres while doubling r
45.

Two similar metal spheres, A and B, have charges of +2.0 x 10-6 coulomb and +1.0 x 10-6 coulomb, respectively. Calculate the magnitude of the electrostatic force on A due to B

a)

2.0N

b)

4.0N

c)

8.0N

d)

1.0N

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