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WorksheetsPS TEST 4: Electricity S2
Total questions: 67
Worksheet time: 38mins
If Bulb 3 burns out in the circuit, what will most likely happen?
Bulb 1 and Bulb 2 will not glow.
Bulb 1 will glow, but Bulb 2 will not glow.
Bulb 1 and Bulb 2 will not glow as brightly.
Bulb 1 and Bulb 2 will continue to glow.
How many batteries are in this circuit?
1
2
3
4
The current in each light bulb is ____________.
The same
Different
Zero
None of these
As more lightbulbs are added in series, the resistance ________, and the light bulbs get _______, because current decreases in the circuit.
increases, dimmer
increases, brighter
decreases, brighter
decreases, dimmer
An example of a good insulator is _______.
wood
salt water
copper
aluminum
examples of good conductors (Pick 3)
wood
salt water
copper
aluminum
a very large discharge of static electricity
Lightning
current
kinetic
none
The balloon gained electrons from your hair and became____________.
negative
positive
neutral
zero
This diagram shows a negatively charged balloon. When the charged balloon is brought near some pieces of paper, the papers are attracted to the balloon. Which describes the charging of the pieces of paper?
positive, due to induction
positive, due to conduction
negative, due to induction
negative, due to conduction
A material through which electrons do not move easily is a(n) ____.
conductor
insulator
fuse
transformer
What is static electricity?
the movement of electrons through a conducting material
any interaction between a person and a metal object
the charging of a neutral object by an electrically charged object
the net accumulation of electric charges on an object
what is the electric charge of the suspended plastic balls
positive 1, negative 2
positive 1, positive 2
negative 1, negative 2
none
what is the electric charge of the suspended plastic balls
positive 1, negative 2
positive 1, positive 2
negative 1, negative 2
neutral 1, positive 2
Resistance in an electrical wire causes electrical energy to be converted to ______.
Hint: A light bulb is a type of resistance
thermal energy
chemical energy
sound
nuclear energy
Which bulbs will have a current in the schematic diagram below?
the one closest to battery
the middle one
the one farthest from the battery
none
The rate at which an electrical device converts energy from one form to another is called ____.
electrical power
electrical energy
electrical resistance
voltage regulation
Electrical power is expressed in __________
watts
volts
ohms
amperes
Your parents pay for every __________of electrical energy your home consumes.
kilowatt hour
watt hour
kilowatt
watt second
A 20 ohm resistor has 0.040 A of current in it. What is the potential difference across the resistor?
HINT: Current = Voltage/Resistance
0.8 V
500 V
0.002 V
0.8 A
Calculate the resistance in a circuit if the current flowing is 15 A and the voltage difference is 48 V.
Hint: Current= Voltage / Resistance
I = V/R
3.2 ohms
0.31 ohms
720 ohms
3.2 volts
A light bulb is plugged into a 45 V wall outlet. How much electrical power does the light bulb use of the current in the light bulb is 35 A?
Hint: Electrical Power = Current x Voltage
1575 W
1575 KW
1575 KWHr
0.78 W
What is the voltage in a dryer if the dryer uses 5000 W of power when plugged into a 50-Amperes wall outlet?
Electric Power = Current x Voltage
100 Volts
500 Volts
0.01 Volts
500 Amps
A TV has a power rating of 0.95 kW. How many hours was the TV on during the day if it uses 5.7 kWh?
Hint: Electric Energy = Power x time
6 hr
5 Hr
0.17 Hr
5.4 Hr
A toy car has a maximum power of 500 W when it is hooked up to a 50 V battery. What is the resistance of the car battery?
Hint: P = I x V
I = V/R
500 ohms
500 amps
50 ohms
5 ohms
A power company charges $0.80/kWh. If you use 200 kWh in a day. How much will you be charged for that day?
Hint:
Cost = Electric Power x Rate ($/kWh)
$160
$250
$100
$4
What is the standard voltage difference of electrical energy coming out of the electrical sockets in the United States?
12 V
120 V
1200 V
220 V
What is the current in a circuit if the voltage difference is 20 V and resistance is 4 ohms?
HINT: I = V/R
5 A
0.2 A
80 A
80 V
Name one thing that is necessary to keep current flowing.
a circuit breaker
a moist chemical paste
an unbroken path for electrons to follow
a broken path for electrons to follow
Which of the following circuit has the largest resistance?
__________ is the push that causes charges to move.
Potential difference (voltage)
Resistance
Induction
Static
If the Comb is negatively charged, what is the charge of the leaves?
Positive
Negative
Neutral
Which device in the figure above is charged?
Left
Right
none
This electroscope is charged by __________
induction
conduction
resistance
Which of the following actions increases the resistance of a wire?
making it longer
decreasing the temperature
making it shorter
making it thicker
The reading in the ammeter will be __________, since electrons don’t have a complete path to flow.
zero
low
high
3V represents the battery, 2 ohms represents a resistor, 4 ohms represents a light bulb resistor, the switch and the A represents a(n) _______________
Ammeter (measures current)
Anti-current
Apple switch
The current in the resistor and the light bulb will be _______.
zero
same
different
similar
The above schematic diagram represents what type of circuit?
open
closed
parallel
Race
Compare the brightness of bulb A in circuit 1 with bulb A in circuit 2. Which bulb is brighter?
Bulb A in circuit 1
Bulb A in circuit 2
they are the same
Compare the brightness of bulb A and B in circuit 2. Which bulb is brighter?
They have the same brightness
Bulb A
Bulb B
In which ammeter is the current the least?
1
2
3
In which ammeter is the current the MOST?
1
2
3
In which type of circuit are there two or more branches for current to move through?
series
parallel
How many bulbs are lit in the circuit below? (Think about how the electrons flow)
1
2
3
none
Light bulbs 1 and 2 are in ______with one another.
series
parallel
anti-series
none
Current flows through light bulb(s)________.
1 and 2
1 and 3
2 and 3
none
Which circuit(s) above represent(s) a circuit consisting of 2 light bulbs in parallel with a battery?
1 and 2
2 and 3
1,2, and 4
3 only
Appliances connected so that they form a single pathway for charges to flow are connected in a(n)
Series circuit
Parallel circuit
closed circuit
The reading in each ammeter is _________________.
2 A
2 and 1 A
0 A
The current in a circuit will __________as the battery voltage is increased.
HINT: I = V/R
Current is directly proportional to voltage
Current is indirectly proportional to Resistance
increase
decrease
be the same
According to this law current in a circuit __________, as the resistance __________.
HINT: I = V/R
Current is directly proportional to voltage
Current is indirectly proportional to Resistance
increases; decreases
decrease; remain the same
decreases, decreases
The statement, current is equal to the voltage difference divided by the resistance, is known as
Ohm's Law
Coulomb’s law
Faraday’s law
The purpose of fuses and circuit breakers is to _________.
prevent circuits from overheating
allow circuits to be overloaded
decrease the resistance in a series circuit
prevent breaks in the circuit
A car battery is an example of a ____cell. It changes _________energy into _______energy
wet, chemical, electrical
wet, electrical, chemical
dry, chemical, electrical
dry, chemical, thermal
In the circuit shown below, which bulb, when burned out, will cause all other bulbs to stop glowing?
A
B
C
D
F
Current flows from _______________ voltage to ___________ voltage
High; Low
Low; High
High; High
If there is not battery
The rate at which an electrical device converts energy from one form to another is called ____.
Electric Power
Electric Energy
Voltage
Current
In Ohm's Law current (I) is directly proportional to _____________ and indirectly proportional to _________________
Voltage; Resistance
Resistance; Voltage
Voltage; Power
Resistance; Electricity
Electrical Power units
Hint: P= I . V
Watts
Joules
Amps
Volts
Electrical Energy in your household is measured in:
E = P . t
Kilowatts Hour (KWH)
Joules Hour
Newtons
Amps
