WorksheetsCh 19 Current & Resistance Quiz
Total questions: 42
Worksheet time: 21mins
Resistance is measured in
volts.
A 3A current flows through a television. How long would it take for 1500C to flow through it?
4500s
500s
50s
450s
How much charge flows through a wire in 80s if the current is a constant 5.4A?
432C
360C
524C
344C
There is a charge of 120 C that flows through a resistor in 40 s. What is the amount of current over this period of time?
3.0 A
4,800 A
4,800 mA
0.33 A
The unit for electrical current is
Coulomb
Volt
Ampere
Ohm
How do you calculate resistance?
Voltage divided by current
Charge divided by current
Current multiplied by voltage
Voltage multiplied by current
Electric current in a wire is the
number of electric charges moving from one location to another in the wire.
net movement of electrical energy through the wire.
rate at which electric charges move through a cross-section of wire.
rate at which electrical energy is used to move charges through the wire.
The diagram above represents a wire in which the net flow of electrons is to the right. The direction of the conventional current in the wire
depends on the potential difference.
is to the left.
is the same direction as the electron flow.
cannot be determined.
The net velocity of charges as they move through a conductor as it moves randomly through a conductor while experiencing multiple collisions in the process.
Which of the following are voltage sources?
Ohm's Law
resistance
electric charge
batteries and generators
What is the resistance if the voltage is 10V and the current is 2A?
20 Ω
5 Ω
12 Ω
8 Ω
What are the units for resistance?
Ohms (Ω)
Voltage (V)
Amps (A)
Charge (C)
If the length of a wire increases, the resistance ____________
a. decreases
b. increases
c. stays the same
d. unknown
What is the resistance if the current is 2A and the voltage is 10V?
8 Ω
20 Ω
12 Ω
5 Ω
What is the potential difference across a 10 ohm resistor if the current in the resistor is 3.0 A?
0.3 V
3 V
30 V
15 A
Which factor is least likely to affect the resistance of a conductor?
the length of the conductor
the temperature of the conductor
the overall shape of the conductor
the material the conductor is made from
Which wire will have the least resistance?
10 cm
20 cm
30 cm
40 cm
How does the thickness of a wire affect resistance?
A thicker wire has more resistance
A thinner wire has more resistance
Thickness of a wire does not affect resistance
Measure of a material’s ability to conduct or transmit electricity
Time rate of change of energy in an electric circuit
Experiments show that the resistance is constant over a wide range of applied potential differences. It is often written as V=IR , where R is the resistance. This is...
potential difference
The diagrams above represent four pieces of copper wire at 20.oC. For each piece of wire, L represents a unit of length and A represents a unit of cross-sectional area.
The piece of wire that has the greatest resistance is
wire 1
wire 2
wire 3
wire 4
What is the current in an electric circuit?
The energy of the circuit
The flow of electrons in the circuit
The power of the circuit
A potential difference of 24 V is applied to a 150 resistor. How much current flows through the resistor?
0.15 A
3600 A
6.25 A
0.16 A
The voltage supplied to a circuit is 17 V and the current running through is 10 A. What is the power generated?
170 W
170 A
1.7 V
1.7 W
The unit of energy is?
Amp
Joule
kiloWatt
Volt
What is the unit of electrical power?
Joule
Watt
Where
Amp
The unit used by utility companies to measure electrical energy consumed.
KiloWatt-Hour (kWh)
Watt
Joule
Amp
Resistance × Voltage
Voltage × Current
Voltage ÷ Current
Voltage ÷ Resistance
Electric current where the motion of charges continuously changes in the forward and reverse directions.
What are the units for current?
Ohms (Ω)
Voltage (V)
Amps (A)
Charge (C)
What are the units for voltage?
Ohms (Ω)
Voltage (V)
Amps (A)
Charge (C)
