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NGSS Physics IS3T2: Circuits

Total questions: 49

Worksheet time: 48mins

Name
Class
Date
1.

The picture shows an electrical circuit. This circuit is a series circuit because:

a)

It has 3 light bulbs.

b)

The same current flows through all three light bulbs.

c)

It uses a single battery.

d)

The electrical current has more than one path to flow through

2.

How many lightbulbs will work if there is a break in the circuit at POINT A?

a)

1

b)

2

c)

3

d)

NONE

3.
If the current through the battery was 10A in this diagram. What would the current through each bulb be?
a)
10A
b)
5A
c)
20A
d)
0A
4.

The equivalent resistance in this circuit is

a)

100 ohms

b)

450 ohms

c)

400 ohms

d)

30 ohms

5.
This circuit won't work. What essential part is missing from this circuit?
a)
resistance
b)
source of electric current
c)
conductor
d)
ammeter
6.

A 2.0-ohm resistor and a 4.0-ohm resistor are connected in series with a 12-volt battery. If the current through the 2.0-ohm resistor is 2.0 amperes, the current through the 4.0-ohm resistor is

a)

1.0 A

b)

2.0 A

c)

3.0 A

d)

4.0 A

7.

Where should an ammeter be located to correctly measure the total current and where should a voltmeter be located to correctly measure the total voltage?

a)

ammeter at 3 and voltmeter at 4

b)

ammeter at 1 and voltmeter at 4

c)

ammeter at 2 and voltmeter at 3

d)

ammeter at 1 and voltmeter at 2

8.

The total current through this circuit is

a)

0.02 amps

b)

0.09 amps

c)

50 amps

d)

9 amps

9.

The voltage dropped across the 300 ohm resistor is

a)

6 V

b)

9 V

c)

2 V

d)

30 V

10.
If you replace the paper clip with a plastic spoon, what happens?
a)
The bulb doesn't light
b)
The bulb is dimmer
c)
The wires get hot
d)
There is no change
11.
A series circuit has ____ path(s) that the electric current can take. 
a)
One
b)
Two 
c)
Three 
d)
Four
12.
In a parallel circuit, if one connection is broken, all of the connections stop working.
a)
True
b)
False
13.
Which of these objects is an insulator?
a)
Copper Wire
b)
Paper Clip
c)
Steel Pole
d)
Rubber Gloves
14.
An object through which electrons can easily flow is called a(n) ___________.
a)
Conductor
b)
Insulator
15.
Which one is a conductor? 
a)
wood 
b)
iron 
c)
plastic spoon 
d)
paper 
16.
Would would best complete this circuit?
a)
A wire
b)
A switch
c)
A battery
d)
A light bulb
17.
Electricity is the flow of _________.
a)
Protons
b)
Neutrons
c)
Electrons
18.
What kind of circuit is this?
a)
series
b)
parallel
19.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
20.
As the resistance in a circuit increases, the electric current __________.
a)
increases
b)
decreases
c)
stays the same
21.

is the opposition to the flow of charges in a material.

a)

Resistance

b)

Voltage

c)

Time

d)

Current

22.

What would happen if in a circuit the voltage is increase?

a)

The time would increase

b)

The current would increase

c)

The current would decrease

d)

The current would stay the same

23.

What would happen if in a circuit, the resistance increases but the voltage stays the same?

a)

The current would decrease

b)

The current would increase

c)

The voltage would decrease

d)

The voltage would increase

24.

Why electrical wiring usually are covered with a layer of plastic?

a)

To make it look pretty

b)

To help electricity flow along the wire

c)

To make it safe

d)

To add more energy

25.

What needs to be done to this circuit so that the lamp lights up?

a)

Close the switch

b)

Add a source and close the switch

c)

Add another lamp

d)

Add another lamp and a switch

26.

If lamp 1 is unscrewed from its holder, what will happen to lamp 2?

a)

It will get brighter

b)

It will stay the same brightness

c)

It will go out

d)

Nothing will happen

27.
What is a switch's function in a circuit?
a)
to make the current hotter or colder
b)
turn on and off the flow of current
c)
the pathway that current flows
d)
to add more power to the circuit
28.
This instrument can be used to see if materials conduct electricity.  Which of these groups contains items that could all conduct electricity to complete the circuit?
a)
rubber ball, plastic comb, nail
b)
paper clip, penny, screw
c)
cork, dollar bill, tweezers
d)
pencil, eraser, spoon
29.
What will happen if one light bulb is removed from this circuit?
a)
the other bulbs will go out
b)
the other bulbs will get dimmer
c)
the other bulbs will get brighter
d)
the battery will become stronger
30.
Which light will be brighter and why?
a)
Bulb A because its circuit is closed
b)
Bulb B because its circuit is closed
c)
Bulb B because it has more volts
d)
Bulb A because it has less volts
31.

What power is dissipated in the whole circuit?

a)

8 W

b)

4 W

c)

2 W

d)

1 W

32.
Voltage is measured in __.
a)
volts.
b)
watts.
c)
coulombs. 
33.
Current has units: 
a)
kilowatt·hour 
b)
ampere 
c)
coulomb 
d)
volt 
34.
In a parallel circuit which of the following is the same value throughout the circuit?
a)
Voltage
b)
Current
c)
Resistance
d)
Charge
35.
Which of the two circuits would have the brightest bulbs? 
a)
A
b)
B
36.

What is voltage?

a)

the power in a machine

b)

the difference in electric potential energy per charge.

c)

how much electricity is in an object

d)

the electric current

37.

Solve for the total resistance of the circuit shown

a)

50 V

b)

1970 ohms

c)

705 K ohms

d)

20 Amps

38.

Solve for the voltage drop at resistor 1

a)

38 volts

b)

60 Kvolts

c)

50 volts

d)

25 volts

39.

Voltage drop stands for what?

a)

the voltage applied to a circuit

b)

the voltage flowing through a resistor

c)

the voltage used by a load

40.

With three 10 resistors connected in series with a 30 volt power supply, the total circuit current will equal ____.

a)

300 amps

b)

1 amp

c)

150 amps

d)

1 millamp

41.

Using the circuit shown solve for total power dissipated in this circuit.

a)

20 watts

b)

30 watts

c)

1.8 Kilowatts

d)

180 watts

42.

The wattage being dissipated at R3 is ______________________________ W.

a)

18

b)

54

c)

36

43.

The voltage drop across R1 is ______________________________ V.

a)

20

b)

30

c)

40

d)

50

44.

The wattage being dissipated at R2 is _______________ W.

a)

27

b)

12

c)

15

d)

36

45.

When a resistor in a series circuit is replaced by another resistor with an increased resistance value, the total circuit current will __________.

a)

stay the same

b)

decrease

c)

increase

d)

double in value

46.

This circuit has only one path for current to flow

a)

series

b)

parallel

c)

combination

d)

split

47.

__________ remains the same in a series circuit.

a)

Resistance

b)

Voltage

c)

Current

d)

Power

48.

What happens to total current in a series circuit when the total voltage stays the same, circuit resistance decreases, current will ____________.

a)

increase

b)

Stay the same

c)

Decrease

49.

What is the total circuit resistance of two 25 ohm resistors and three 75 ohm resistors connected in series?

a)

100 ohms

b)

200 ohms

c)

275 ohm

d)

175 ohms

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