1. Conservation of Current
Circuits Jeopardy
Symbol and Units of…
Current, Voltage
Resistance/
Resistivity
Conservation of Current
Who is missing? 10 20 30 40 50

2. Electric Current
Symbol: I
Units: Amperes (A)
Category

3. Potential difference
Symbol: V
Units: Volts (V)
Category

4. Electric Charge
Symbol: q
Units: Coulombs (C)

5. Work
Symbol: W
Units: J

6. Charge divided by time
Amperes

7. If 100 coulombs of charge pass through a wire in 5 seconds, what is the current?
20 Amperes

8. If 50 joules of work is done on 5
If 50 joules of work is done on 5.5 coulombs of charge, what is the potential drop?
9.1

9. What is the charge that moves through a wire with a current of 10 amperes in 10 seconds?

10. What is the potential difference applied on a 25 ohm resistor with a current of 10 amperes?
250 V

11. What is the potential difference felt by a device that moves 30 coulombs of electric charge every 3 seconds across a 5 ohm resistor?
50 Volts

12. What is the resistance in a wire that has length of 2 meters, cross-sectional area of 5 meter squared and a resistivity of silver?
6.39 x 10^-9 ohms

13. If I wanted to change one of these factors about a copper wire, which of the following will provide the strongest resistance?
Doubling the area of the wire
Doubling the length of the wire
Doubling both the length and area of the wire
None of the above B.

14. If I have a wire with a resistance of 10 ohms, a resistivity of 5 ohm meters and a cross-sectional area of 3 meters squared, then what is the length of my wire?
6 meters

15. Say we had wires of the same length and cross-sectional area for each of the materials in the table below. Which one would produce the least resistance in a circuit?
Silver

16. What is cross-sectional area of a wire who has a length of 0
What is cross-sectional area of a wire who has a length of 0.02 meters, a resistivity of 1.72 x 10-8 ohm meters, and a resistance of 40 ohms?
8.6 x meters squared

17. What is the law of conservation of current?
Current going in = current going out

18. The diagram below represents currents in branches of a circuit
The diagram below represents currents in branches of a circuit. What should be the reading in ammeter A? 8A 6A P A
14 amperes

19. The diagram below represents currents in branches of a circuit
The diagram below represents currents in branches of a circuit. What should be the reading in ammeter A? 5A 5A P 2A A
8 A

20. Which diagram represents the correct current direction in a segment of an electric circuitb)
2 A
2 A
2 A
2 A
4 A
4 A c) d)
2 A
2 A D
2 A
2 A

21. What is the reading in ammeter A

22. Maggie

23. Brian

24. Buster Bunny

25. Spunky

26. Dill Pickles