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Physics
9th -
12thgrade
Voltage, Current, and Resistance (Physics 12)
21 questions
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- 1. Multiple Choice
Copper is a metal commonly used for electrical wiring in houses. Which metal conducts electricity better than copper at 20oC?
nichrome
gold
silver
aluminum
- 2. Multiple Choice
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
- 3. Multiple Choice
An MP3 player draws a current of 0.120 ampere from a 3.00-volt battery. What is the total charge that passes through the player in 900. seconds?
324 C
108 C
1.80 C
5.40 C
- 4. Multiple Choice
What is the current in a wire if 3.4 x 1019 electrons pass by a point in this wire every 60. seconds?
11 A
3.1 x 10-11 A
9.1 x 10-2 A
1.8 x 10-18 A
- 5. Multiple Choice
What is the resistance of a 20.0-meter long tungsten rod with cross-sectional area of 1.00 x 10-4 meters2 at 20oC?
112 ohms
1.12 x 10-2 ohms
89.3 ohms
2.80 x 10-5 ohms
- 6. Multiple Choice
The resistance of a circuit remains constant. Which graph best represents the relationship between the current in the circuit and the potential difference provided by the battery?
- 7. Multiple Choice
Resistivity, the inverse of conductivity, is dependent on which of the following? (choose one)
shape of the wire
length of the wire
cross-sectional area of the wire
type of metal
- 8. Multiple Choice
The resistance of a material
depends on its resistivity and the geometric properties of the material.
does not depend on its resistivity or the geometric properties of the material.
depends on its resistivity but not the geometric properties of the material.
does not depend on its resistivity but on the geometric properties of the material.
- 9. Multiple Choice
Wire A has twice the cross sectional area of wire B. The resistance of wire B is __________________ wire A.
1/4 as much as
1/2 as much as
the same as
twice as much as
- 10. Multiple Choice
How will increasing the amount of resistance in a circuit affect the current if the voltage remains constant?
It will increase
It will not change
It will decrease
It will cease
- 11. Multiple ChoiceVoltage is measured in __.volts.watts.coulombs.
- 12. Multiple ChoiceCurrent has units:kilowatt·houramperecoulombvolt
- 13. Multiple ChoiceWhat 'flows' in a wire?ProtonsNeutronsAtomsElectrons
- 14. Multiple Choice
What is the definition of electrical current?
The opposition to the flow of electrons
The rate of flow of charge
The work done on each coulomb of charge
Electrons moving around
- 15. Multiple ChoiceResistance is measured in ___.watts.amps.ohms.
- 16. Multiple Choice
What happens to resistance when the length of the wire increases?
Stays the same
Increases
Decreases
- 17. Multiple Choice
What effect does a hotter temperature have on resistance?
No effect
Increases resistance
Decreases resistance
Stays the same
- 18. Multiple Choice
What is the resistance if the current is 2A and the voltage is 10V?
8 Ω
20 Ω
12 Ω
5 Ω
- 19. Multiple Choice
The mathematical relationship between Current, Voltage and Resistance
Faraday's Law
Coulomb's Law
Edison's Law
Ohm's Law
- 20. Multiple ChoiceWhat voltage is needed to cause a 2A current flow through a 10Ω resistor?5V0.2V20V200V
- 21. Multiple ChoiceWith the engine running the charging system produces 14.5 Volts what would the current flow be if a resistance of 6 Ohms was present2.41 Ohms2.52 Ohms2.1 Ohms0.3333 Ohms
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