Current Electricity – Quiz Review Questions – 1. The potential difference of a circuit is a measure of the a) Rate of the flow of electrons b) Opposition to the flow c) Difference in the electric potential energy per unit of charge between two points d) Number of electrons flowing from the negative electrode to the positive electrode 2. A wire with which of the following attributes would tend to have the most resistance? a) Long b) Thick c) Cold d) Copper 3. Electrical resistance is calculated by a) Subtracting current from potential difference b) Dividing potential difference by current c) Multiplying potential difference and current d) Adding current and potential difference True or False 4. An ammeter measures the number of electrons flowing in a circuit. 5. When a load fails in a series circuit, all loads will stop working. 6. The human body can withstand electric currents of up to 15A. Fill in the blanks 7. An ohmmeter is a device used to measure . 8. According to Ohm’s law potential difference varies directly with . 9. A is a method of drawing an electric circuit using standard symbols. Math the terms 10. a. b. c. d. Energy source Electrical conductor Load Control device 1. 2. 3. 4. Switch Copper wire Lamp Battery Short answers 11. Why must an ammeter be connected in series with a load to measure the current flowing through the load? 12. Explain why a burnt-out filament has the same effect as an open switch?