1. Standard Brightness

2. Series

3. Which bulb, if either, in a series circuit is brighter? A.first bulb B.second bulb C.They have equal brightness.

4. The brightness of bulbs in series ___ the standard brightness. A.is dimmer than B.have the same brightness as C.is brighter than

5. The current from the battery with the bulbs in series is ____ than the standard current? A.less than B.equal to C.greater than

6. The resistance in the circuit with the bulbs in series is ____ that the standard resistance. A.less than B.equal to C.greater than

7. Parallel

8. Which bulb, if either, in a parallel circuit is brighter? A.left bulb B.right bulb C.They have equal brightness.

9. The brightness of bulbs in parallel ___ to the standard brightness. A.is dimmer than B.is the same brightness as C.is brighter than

10. The current from the battery with the bulbs in parallel is ____ than the standard current. A.less than B.equal to C.greater than

11. The resistance in the circuit with the bulbs in parallel is ____ that the standard resistance. A.less than B.equal to C.greater than

12. circuit 1 A) circuit 1 circuit 2 B) circuit 2 both the same C) both the same it depends on R D) it depends on R The lightbulbs in the circuit below are identical with the same resistance R. Which circuit produces more light? (brightness  power)

13. A) increases B) remains the same C) decreases D) drops to zero Points P and Q are connected to a battery of fixed voltage. As more resistors R are added to the parallel circuit, what happens to the total current in the circuit?

14. 9 V Assume that the voltage of the battery is 9 V and that the three resistors are identical. What is the potential difference across each resistor? A) 12 V B) zero C) 3 V D) 4 V E) you need to know the actual value of R

15. 12 V R 1 = 4  R 2 = 2  In the circuit below, what is the voltage across ? In the circuit below, what is the voltage across R 1 ? A) 12 V B) zero C) 6 V D) 8 V E) 4 V

16. In the circuit to the right, what is the current through ? In the circuit to the right, what is the current through R 1 ? 10 V R 1 = 5  R 2 = 2  A) 10 A B) zero C) 5 A D) 2 A E) 7 A

17. E F G

18. Which bulbs are the brightest? A.E B.F C.G D.F & G E.E, F & G

19. Which bulbs are the dimmest? A.E B.F C.G D.F & G E.E, F & G

20. What happens to the brightness of bulb F if I unscrew bulb E? A.goes out B.gets dimmer C.stays the same D.gets brighter

21. What happens to the brightness of bulb E if I unscrew bulb F? A.goes out B.gets dimmer C.stays the same D.gets brighter

22. What happens to the brightness of bulb G if I short circuit bulb F? A.goes out B.gets dimmer C.stays the same D.gets brighter

23. What happens to the brightness of bulb F if I short circuit bulb E? A.goes out B.gets dimmer C.stays the same D.gets brighter

24. A 10  bulb and a 20  bulb are connected in series. Which bulb is brighter? A)The 10  B)The 20  C)They are the same brightness

25. A 10  bulb and a 20  bulb are connected in parallel. Which bulb is brighter? A)The 10  B)The 20  C)They are the same brightness

26. 1. The brightest bulb is a) A b) B c) C d) De) A and B

27. The dimmest bulb is a) A b) B c) C d) De) A and B

28. Which bulb has the least voltage across it? a) A b) B c) C d) De) B and C