* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Block ______ minutes spent on DH:______ Last name First name
Ground (electricity) wikipedia , lookup
Electric battery wikipedia , lookup
Power engineering wikipedia , lookup
Electrical substation wikipedia , lookup
History of electric power transmission wikipedia , lookup
Photomultiplier wikipedia , lookup
Earthing system wikipedia , lookup
Electrical ballast wikipedia , lookup
Switched-mode power supply wikipedia , lookup
Rechargeable battery wikipedia , lookup
Voltage optimisation wikipedia , lookup
Power MOSFET wikipedia , lookup
Buck converter wikipedia , lookup
Stray voltage wikipedia , lookup
Resistive opto-isolator wikipedia , lookup
Surge protector wikipedia , lookup
Mains electricity wikipedia , lookup
Alternating current wikipedia , lookup
Network analysis (electrical circuits) wikipedia , lookup
Block __________ minutes spent on DH:_________ Last name _________________________________________ First name ________________________________________ Freshman Physics Honors with Dr. Leopold DH42 – Voltage, Resistance and Ohm’s Law (Goes with day 62. Self-grade out of 23.) 1. The source in an electric circuit performs two functions. What are they? 2. Fill in the table below. name of symbol quantity SI unit If the unit is short for some combination of other units, show that in this column. charge current resistance voltage 3. The SI unit called the volt is short for joules per _______________________. 4. Suppose you are using a 1.5 V battery as your source in an electric circuit. How much energy does an electron pick up as it goes through the source one time? Show your calculation. 5. A 9.00-V battery will give __________________________J of energy to each electron that passes through it. (Calculation required – use space below.) 6. Suppose enough electrons pass through a 1.5 V battery that the total charge passing through the battery is 1.00 coulomb. How much energy (total) did the source give to those electrons? 7. What do you have to do to a generator to increase the voltage it supplies to your circuit? 8. The electrical energy given to an electron as it passes through the source is __________________________ the electrical energy taken from an electron as it passes through the load. 9. In an electric circuit, the voltage of the source is __________________________ the absolute value of the voltage of the load. 10. When you increase the source voltage in a circuit the ___________________ in the circuit increases in response. 11. The only circuit element you can use for a load that has an I vs. V graph that is a straight line through (0,0) is a ______________________________. 12. A 450 ohm resistor resists current _________________ than a 100 ohm resistor. 13. Consider an I vs. V graph for a resistor. Find the units of the slope of the line. Show your work. 14. In a closed circuit, does more current come out of one side of a battery than goes in the other side? Explain your answer. TRUE OR FALSE? 15. Current and voltage mean the same thing. 16. In a circuit with a battery and a light bulb, the battery sends electrons to the light bulb, and the light bulb uses up the electrons to create heat and light. 17. Current gets used up in a circuit. 18. A 1.5 V battery is connected to a 45.0 ohm resistor. Find the current in the circuit. Show your work. 19. A 45 ohm resistor is connected to a generator and 1.20 A of current flow in the circuit. What must the source voltage of the generator be? Show your work.