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. 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 2 2. What is the unit for electrical current?

Question 3 3. The arrow in the diode schematic symbol denotes the _____.

Question 4 4. Which diode would you use for fiber optic communications?

Question 5 5. Which of the following statements is true about the ohm as a unit?

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Question 6 6. A 24-watt automobile headlight is powered by the car's 12V system. What is the internal resistance of the bulb (in ohms)?

Question 7 7. Electric potential is analogous to _____ potential because it describes a particles potential energy solely as a function of its location in a energy field.

Question 8 8. What is the potential difference between two locations if their individual potentials are 4.5 V and 2.3 V?

Question 9 9. The two types of current are:

Question 10 10. Current is:

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Question 11 11. This type of material allows electricity to flow through it:

Question 12 12. This is the unit of measure for electrical current:

Question 13 13. What is the apparatus used to measure electric charge and standardize the ampere unit?

Question 14 14. 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 15 15. According to Ohm's law, increasing the voltage _____

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Question 16 16. For a fixed voltage input, increasing the resistance

Question 17 17. Power is a measure of how much:

Question 18 18. One watt is equal to:

Question 19 19. What is an electric circuit?

Question 20 20. Which of the following devices is used to measure the current in a circuit?

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Question 21 21. Resistivity is:

Question 22 22. Electrical resistance:

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

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Question 26 26. Diodes allow the current to flow in:

Question 27 27. 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 28 28. Due to its location in an electric field, a charged particle has _____ energy.

Question 29 29. The transfer of electrical energy through a conductor:

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 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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