PhysicsIHReviewforelecCircuits - What is the voltage used...

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Physics IH Review: Resistance and Circuits A Van de Graaf Generator contains 6.5 E11 extra electrons. You hold your knuckle 5 cm from the generator and a spark is observed. The duration of the spark is 2.4 milliseconds. 1. What is the magnitude of the electric field at the point where the knuckle is held? 2. What is the voltage in the spark? 3. How much energy is in the spark? 4. How much current is in the spark? Inspect the circuit shown below and then answer questions relating to the circuit . 5. What is the reading of A 1 in the circuit? 6. What is the voltage used by the 3 Ω resistor? 7. What is the wattage of the 12 Ω resistor? 8. The parallel resistors can be replaced by a single ___ Ω resistor. 9. How many electrons pass through the A2 ammeter in 5 minutes? 10. How much charge goes through the 30 Ω resistor in 3 minutes? 11.
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Unformatted text preview: What is the voltage used by the 8 ohm resistor? A typical lightning bolt from a cloud hits a tree after traveling 190 m to the treetop through an electric field of 2.5E6 N/C. The duration of the bolt is 125 ms. 30 Ω 3 Ω 12 Ω 6 Ω 8 Ω 63V A 1 A 2 A 3 12. What is the charge in the cloud? 13. What is the voltage in the bolt? 14. What is the current in the bolt? 15. How much power is delivered by the bolt? (in watts) 16. How much energy does the bolt deliver? 17. What is the maximum resistance of resistors having values of 23 Ω , 18 Ω and 47.5 Ω ? 18. What is the minimum value of the three resistors mentioned above? Answers: 1) 374,400 N/C 2) 18720V 3)1.9mJ 4)043mA 5) 3.0 A 6) 9.0V 7) 38.9 W 8) 12 9) 2.25E21 10) 216C 11)14.4V 12) 10.0C 13) 4.75E8V 14) 80A 15) 3.8E10W 16) 4.75E9J 17) 88.5 18)10.2...
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This note was uploaded on 03/14/2011 for the course PHYSICS 105 taught by Professor Kruse,m during the Spring '08 term at Duke.

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