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- 1. Multiple Choice
A glass rod is rubbed with silk and becomes positively charged. Which of the following is the most reasonable explanation?
protons are added to the silk
protons are removed from the silk
the silk remains neutral
electrons are removed from the rod
- 2. Multiple Choice
If a simple circuit has one resistor of 3 Ohms and a current of 3 Amps, how many volts is the power source?
Hint: Use Ohm's Law which states V=IR
3 Volts
6 Volts
9 Volts
19 Volts
- 3. Multiple Choice
According to Ohm's Law, if resistance remains constant and voltage increases, then the current will ______________.
Hint: Ohm's Law is V=IR
decrease
increase
stay the same
none of the above
- 4. Multiple Choice
______________ is the opposition to the flow of current in a circuit.
Voltage
Resistance
Ampere
Charge
- 5. Multiple Choice
Potential difference in electrical circuits is measure in
coulonbs
joules
volts
amperes
- 6. Multiple Choice
Which of the following is a true statement?
insulators conduct electricity
insulators increase electricity
conductors conduct electricity
conductors decrease electricity
- 7. Multiple Choice
There is a potential difference of 13 V across a resistor with 1.4 A of current in it. What is the resistance?
18.2
0.107
9.29
- 8. Multiple Choice
18 V
0.0005 V
1800 V
180 V
- 9. Multiple Choice
When resistors are connected end to end in a circuit, they are said to be in series. The total resistance equals the sum of all the resistances. Suppose a string of lights has 25 bulbs. Each bulb has a resistance of 8.0 ?. If the string is plugged into a 120 V outlet, how much current is the entire set of lights?
0.07 A
15 A
0.6 A
375 A
- 10. Multiple Choice
If the two charges represented in the figure above were brought near each other, they would
attract each other
repel each other
cause static discharge
have no effect on each other
- 11. Multiple Choice
Which of the following would be a good conductor?
Rubber
Plastic
Wood
Copper
- 12. Multiple Choice
Which bulb(s) will light up in the circuit shown here?
Light bulb #1 only
Light bulbs #2 & #3 only
Light bulb #2 only
None will light up b/c the switch is shown open
- 13. Multiple Choice
Which bulb in this circuit will shine the brightest?
A
B
E
They will all have equal brightness
- 14. Multiple Choice
Which of these bulbs are connected in series with one another?
B and C
A and B
A, B, and C
A and D
- 15. Multiple Choice
Referring the diagram shown here, which circuit type would this most likely be?
series
parallel
series or parallel
series in parallel
- 16. Multiple Choice
What would the current be in the circuit shown here?
72 A
2 A
0.5 A
- 17. Match
Match the following
Static Electricity Transfer
Induction
Charges are transferred through contact
Conduction
Charges are rearranged but no contact
Friction
- 18. Multiple Choice
Which model shows a circuit where the current flowing through each bulb will be the same as the current at point X?
- 19. Multiple Choice
Suppose you rub an inflated balloon on a carpet, hold the balloon next to a wall, and discover that it "sticks" to the wall. Why did the balloon stick to the wall?
Like charges on the balloon and wall cause an attraction between the two.
Balloons contain an atomic property that allows them to cling to other objects.
Excess charge builds up on the balloon and electrostatic forces allow the balloon and wall to be attracted to one another because they are oppositely charged.
All 3 of these choices are correct in what is happening.
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