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ELECTRICITY Quiz Directions: Select the best answer. formula: I(amperes) = E(volts) / R(ohms) W(watts) = E(volts) x I(amperes) 1. 09, 1 A unit of electrical potential (pressure): A) ohm B) watt C) magnetism D) volt E) ampere 2. 09, 1 Current which flows in one direction is called: A) electricity B) magnetism C) ampere D) direct E) alternating 3. 09, 2 Like static charges ______ each other and unlike charges _______ each other. A) attract, attract B) repel, repel C) attract, repel D) repel, attract 4. 09, 2 Which explains why a balloon rubbed with wool sticks to a wall? A) like charges attract B) rubber is always attracted to walls C) unlike charges attract D) the air in the balloon is attracted to the wall E) some strands of the wool adhere to the balloon and stick to the wall 5. 09, 3 Which explains what happens if a light in a series circuit is removed. A) the rest of the lights become dimmer B) the rest of the lights become brighter C) the rest of the lights are not changed D) the rest of the lights go out E) the fuse will blow out 6. 09, 3 Which of the following explains what happens if a light in a parallel circuit is removed. A) the rest of the lights become dimmer B) the rest of the lights become brighter C) the rest of the lights are not changed D) the rest of the lights go out E) the fuse will blow out 7. 09, 4 How is a voltmeter connected in a circuit? A) connected in series B) connected in parallel C) magnetic induction D) only to the high scale E) none of the above 8. 09, 4 How is a ammeter connected in a circuit? A) connected in series B) connected in parallel C) magnetic induction D) only to the high scale E) none of the above 9. 09, 5 What is the resistance in the following substance if the voltage is 3.5 and the amperage is 7.0? A) 2.0 ohms B) 10.5 ohms C) 2.45 ohms D) .5 ohms E) none of the above 10. 09, 5 Given the amperage of 13.5 and a resistance of 8.9 ohms, what is the voltage? A) 4.6 volts B) 22.4 volts C) 120 volts D) 1.52 volts E) none of the above 11. 09, 6 If the length and the diameter of a resistor were increased, by the same proportion, one would expect the resistance to: A) increase B) stay the same C) decrease D) double E) none of the above 12. 09, 6 If the length of a resistor were increased one would expect the resistance to: A) increase B) stay the same C) decrease D) double E) none of the above 13. 09, 7 A 75 watt light bulb on a 120 volt line in your house draws how many amperes? A) 1.6 amps B) 195 amps C) 3.4 amps D) 45 amps E) none of the above 14. 09, 7 How many watts are being used if the voltage is 12.1 and the amperage is 7.3? A) 53.3 watts B) 146.4 watts C) 19.4 watts D) 1.66 watts E) 88.3 watts
