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In-Class Activity

In-Class Activity. Standard Brightness. In-Class Activity. Series. Which bulb, if either, in a series circuit is brighter?. first bulb second bulb They have equal brightness. The brightness of bulbs in series ___ the standard brightness. is dimmer than have the same brightness as

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In-Class Activity

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  1. In-Class Activity Standard Brightness

  2. In-Class Activity Series

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

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

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

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

  7. In-Class Activity Parallel

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

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

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

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

  12. A) circuit 1 B) circuit 2 C) both the same 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 A)12 V B)zero C)3 V D) 4 V E) you need to know the actual value of R 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?

  15. A)12 V B)zero C)6 V D) 8 V E) 4 V In the circuit below, what is the voltage across R1? R1= 4 W R2= 2 W 12 V

  16. In the circuit to the right, what is the current through R1? R2= 2 W A)10 A B)zero C)5 A D) 2 A E) 7 A R1= 5 W 10 V

  17. F E G In-Class Activity

  18. Which bulbs are the brightest? • E • F • G • F & G • E, F & G

  19. Which bulbs are the dimmest? • E • F • G • F & G • E, F & G

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

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

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

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

  24. A 10 W bulb and a 20 W bulb are connected in series. Which bulb is brighter? • The 10 W • The 20 W • They are the same brightness

  25. A 10 W bulb and a 20 W bulb are connected in parallel. Which bulb is brighter? • The 10 W • The 20 W • They are the same brightness

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

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

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

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