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Electric Currents, Resistance & Potential Difference Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. What is the unit used to measure electric current?

Question 2 2. A copper voltameter uses a square cathode plate measuring 7 inches on each side. The current density is kept at 10 amperes per foot. What current is required to deposit copper fully on both sides of the cathode at the specified current density?

Question 3 3. What well-known expression does this picture represent?

Question 4 4. A 24-watt automobile headlight is powered by the car's 12V system. What is the internal resistance of the bulb (in ohms)?

Question 5 5. The two types of current are:

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Question 6 6. Current is:

Question 7 7. According to Ohm's law, increasing the voltage _____

Question 8 8. For a fixed voltage input, increasing the resistance

Question 9 9. How much work is required to move a particle with a 3 C charge from a location in an electric field to that has a 10 V potential to a location that has a 9 V potential?

Question 10 10. Electric potential is analogous to _____ potential because it describes a particles potential energy solely as a function of its location in a energy field.

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Question 11 11. This is the unit of measure for electrical current:

Question 12 12. This is the type of current we use now:

Question 13 13. _____ is a type of diode which allows for reverse direction of current when a certain voltage is reached. It is often used as a voltage reference.

Question 14 14. The arrow in the diode schematic symbol denotes the _____.

Question 15 15. What is current in a circuit?

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Question 16 16. What is an electric circuit?

Question 17 17. Electrical resistance:

Question 18 18. Electrical resistance is caused by:

Question 19 19. A pacemaker is a device implanted beneath the collar bone that provides shocks to the heart to keep it beating properly. How many electrons are transmitted to a heart if the pacemaker provides 1 milliamp (0.001 amp) of current over 0.1 second?

Question 20 20. How many electrons does it take to equal 100 coulombs of charge?

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Question 21 21. When given the current and resistance, power can be calculated by:

Question 22 22. One watt is equal to:

Question 23 23. Which of the following is NOT a reason that we use symbols in our circuit diagrams?

Question 24 24. What is a circuit diagram (or electrical schematic diagram)?

Question 25 25. What is the apparatus used to measure electric charge and standardize the ampere unit?

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Question 26 26. A circuit contains a voltage source of 3V and an unknown resistance. The current is known to be 300 mA. What is the resistance (in ohms)?

Question 27 27. Direct current:

Question 28 28. Given a voltage of 20 volts applied across a resistor of 10 ohms, the power emitted (dissipated) by the resistor is _____.

Question 29 29. What units are used to describe electric potential difference?

Question 30 30. This is the unit of measure for electrical power:

Electric Currents, Resistance & Potential Difference Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next question. You can skip questions if you would like and come back to them later with the "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. You will lose your work if you close or refresh this page. Good luck!

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