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WorksheetsUnit 9 Review
Total questions: 60
Worksheet time: 32mins
Materials that cut down or resist the flow of charges are called?
conductor
insulator
resistor
circut
One amp is defined as the rate of charge flow equal to __ coulomb per second.
3
2
4
1
What is the power when a voltage of 120 V drives a 2-A current through a device?
120 Watts
360 Watts
240 Watts
A circuit with only one path for the current to flow is a __________________.
parallel circuit
series circuit
mini circuit
device
How many Volts would we need to produce a current of 8 Amps through a 6 Ohm resistor?
1.33 volts
24 volts
0.75
48 volts
A light circuit is operating at 75 Volts. What is the circuit's current if the resistance is 5 Ohms?
375 Amps
50 Amps
15 Amps
0.07 Amps
What resistance is needed to cause a 20A current flow with a 100V battery?
0.2Ώ
2000Ώ
200Ώ
5Ώ
A shorthand method to represent the arrangement of the parts in a circuit is known as a(n):
circuit diagram
closed circuit
electric charge
switch
An equation that states current = voltage / resistance is known as:
potentiometer
Kirchoff's current law
Ohm's law
resistor
If the voltage across the battery was 10V in this diagram, what would be the voltage across each light bulb?
10V
5V
20V
0V
When there is only one path for electrons to move through it is called a _____. When one light goes out, they all go out.
closed circuit
parallel circuit
series circuit
open circuit
This image represents what type of circuit?
open
circular
series
parallel
A circuit with 3 resistors, 10 Ohms, 30 Ohms and 20 Ohms are in series. What is the total resistance
30 Ohms
50 Ohms
60 Ohms
100 Ohms
What is the resistance of a lamp that draws a current of 0.20A when connected to a 12V source?
60Ω
2.4Ω
0.017Ω
12Ω
What kind of circuit is this?
series
parallel
What is the total resistance of a 5 ohm, 10 ohm, and 15 ohm resistor hooked up in SERIES?
10 ohms
0.5 ohms
30 ohms
2.7 ohms
How much CURRENT does a 1200 W bread maker draw from a 110 V outlet?
132000 amps
0.09 amps
1200 amps
10.9 amps
DC current is found in _______, which means the current flows in ________ direction
Batteries, one
Wall outlet, one
Batteries, both
Wall outlet, both
A motor with a resistance of 80Ω is connected to a voltage source. The current is 2.5 A. What is the voltage of the source?
200V
32V
82.5V
80V
What is the equivalent resistance in this circuit?
1.5 Ohms
12 Ohms
19 Ohms
25 Ohms
A 9.0 volt battery delivers a 0.50A current to a bulb connected across its terminals. What power is delivered to the bulb?
0.056 W
4.5 W
18 W
41 W
What is the potential difference, in volts, required to pass a current of 3.0 A through a resistor of 6.0 Ohms?
2.0 V
3.0 V
12 V
18 V
A positive charge of 1.5 x10^-8 C experiences a force of 0.025 N to the left in an electric field. What is the magnitude of the field? E = F/q'
1.7 x 10^6 N/C
2.0 x 10^6 N/C
3.4 x 10^6 N/C
1 x 10^6 N/C
An electric field produces forces that can _____.
produce electric charges
create energy
do work
run an engine
A test charge is used to _____ an electric field.
create
change
measure
destroy
What are electric field lines used for?
to calculate the force on a charged body
to find the direction of a current in space
to explain why charged bodies exert a force on each other
to determine the strength of an electric field
What did Millikan use a uniform electric field between two parallel plates to measure?
charge of an electron
electric fields near conductors
the electric potential difference caused by X-rays
the terminal velocity of a charged oil drop
Choose the correct term:
the quantity that relates the force exerted on a charge to the
size of the charge
volt
electric field strength
equipotential
capacitance
As an electric field becomes stronger, the field lines should be drawn ____ .
closer together
farther apart
thicker
thinner
What magnitude of force is exerted on a 19.9 C charge by an electric field of 4.54 x10^-4 N/C? F=Eq'
5.01 x 10^-3 N
4.5 x 10^-3 N
9.03 x 10^-3 N
4.1 x 10^-4 N
A 6.0-V battery delivers a 0.5 A current to an electric motor
connected across its terminals. What is the power of the motor? P=IV
14 W
2 W
7 W
3 W
A current of 0.50 A is carried through a lamp when it is connected to a 120-V source. What is the resistance of the lamp?
2.4 x 10^2 Ohms
5.5 x 10^2 Ohms
7 x 10^2 Ohms
1.5 x 10^2 Ohms
A battery can be used to convert _____ to electric energy.
electric current
electrons
chemical potential energy
metal particles
In an electric circuit diagram, the conventional direction of current flow is _____.
from the positive terminal
from the negative terminal
toward the resistor
away from the resistor
What unit is used by electric companies to measure energy sold?
kilowatt-hours
joules
amperes
ohms
The diagram shows a simple electric circuit. How much would the power increase if the 6.0-V battery were replaced with a 9.0-V battery?
1.3 W
2.3 W
2.5 W
4.0 W
A 9.0 volt battery delivers a 0.50-A current to a bulb connected across its terminals. What power is delivered to the bulb?
0.056 W
4.5 W
18 W
41 W
If a 9.0-V battery is connected to a circuit with 0.55 A of current, what is the resistance?
5.0 Ohms
6.1 Ohms
16 Ohms
45 Ohms
If four electric devices are connected in a series circuit, the number of current paths is equal to ____ .
two
four
three
one
If three resistors are connected in parallel, there are ____ current paths in the circuit.
one
two
three
four
In an electric circuit, ____ are switches that act as safety devices.
fuses and circuit breakers
fuses and voltage dividers
ammeters
combined circuits
What is the equation to find current in a series of three resistors?
I = V/(R1 + R2 + R3)
I = V/(R1 × R2 × R3)
I = V(R1 × R2 × R3)
I = V(R1 + R2 + R3)
