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- 1. Multiple Choice
What are the units for electrical resistance?
ohms
joules
volts
amps
- 2. Multiple Choice
In a wire, _________________ flow from negative to positive
metal atoms
resistors
electrons
ohms
- 3. Multiple Choice
A 25 ohm resistor is connected in series with a 15 ohm resistor. What is the total resistance?
10 ohms
375 ohms
40 ohms
9.4 ohms
- 4. Multiple Choice
A 25 ohm resistor is connected in parallel with a 15 ohm resistor. What is the total resistance?
80 ohms
375 ohms
40 ohms
9.4 ohms
- 5. Multiple Choice
Substances with high resistivity such as plastics and ceramics.
conductors
insulators
semiconductors
fixed resistors
- 6. Multiple Choice
The resistance of a piece of wire does not depend on _________________.
wire material
wire mass
wire length
wire cross sectional area
- 7. Multiple Choice
Ohm's law is ________________
R = V X I
V= I X R
I = R X V
V = I / R
- 8. Multiple Choice
The voltage is 5 Volts. The Resistance is 25 ohms. What is the current?
5 A
0.2 A
20 A
125 A
- 9. Multiple Choice
If the resistance remains the same in a circuit but the current increases, what happened to the voltage?
increases
decreases
remains the same
unknown
- 10. Multiple Choice
If the voltage remains the same in a circuit but the resistance increases, what happens to the current?
increases
decreases
remains the same
unknown
- 11. Multiple Choice
If the length of a wire increases, the resistance ____________
decreases
increases
stays the same
unknown
- 12. Multiple Choice
If the cross sectional area of a wire decreases, the resistance in the wire will ____________
decreases
increases
stays the same
unknown
- 13. Multiple Choice
The current is 10 amps. The resistance is 5 ohms. What is the voltage?
2 V
5 V
50 V
10 V
- 14. Multiple Choice____________ allows electricity to flow.A conductorAn insulatorA magnet
- 15. Multiple Choicethe tendency for a material to oppose the flow of electronscurrentcircuitresistancedifference
- 16. Multiple ChoiceThe mathematical relationship between Voltage, Current, and Resistance:Faraday's LawTesla's LawEdison's LawOhm's Law
- 17. Multiple Choice
Which of the following is NOT a conductor?
Wood
Wire
Metal
Copper
- 18. Multiple Choice
The current passing through bulbs in series will be......the same...different - 19. Multiple ChoiceIf we have several light bulbs connected to a battery in parallel...The voltage will be the same across each bulbthe current will be the same across each bulbThe current will be the same through each bulbThe resistance will be the same across each bulb
- 20. Multiple ChoiceChoose the material that is an insulator.PlasticSteelCopperAluminum
- Answer choicesTagsAnswer choicesTags