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- 1. Multiple ChoiceAn electric generator convertssolar energy to electric energy.thermal energy to electric energy.chemical energy to electric energy.mechanical energy to electric energy.
- 2. Multiple Choice
The figure below shows a neutral glass rod and a positively charged metal sphere. Which of the following best describes the movement of charges as this glass rod touches the sphere?Negative charges move from the sphere to the glass rod.Negative charges move from the glass rod to the sphere.Positive charges move from the sphere to the glass rod.Positive charges move from the glass rod to the sphere. - 3. Multiple ChoiceJoel inflates a balloon and ties it off. He then rubs the balloon against his hair, which makes his hair stand up. He then places the balloon near the classroom wall and sticks it to the wall. Finally, he pops the balloon with a pin. Which of these is an example of gaining a charge by friction in the example above?rubbing the balloon against his hairplacing the balloon near the classroom walltouching the balloon to the classroom wallpopping the balloon with a pin
- 4. Multiple ChoiceA neutral metal bowl is touched by a negatively charged metal rod. During this process, electrons travel from the __________ to the ____________, and the bowl becomes ______________ charged.bowl, rod, positivelyrod, bowl, positivelybowl, rod, negativelyrod, bowl, negatively
- 5. Multiple ChoiceThe battery in a cell phone provides a constant flow of electrons through conductors in the same direction to power the phone. A cell phone is powered by ____________ current.alternatingdirectamperedistributed
- 6. Multiple ChoiceAs electrons flow through this circuit, the voltage remains constant. If the size of the resistor were to increase,the electrons would slow down.the electrons would speed up.less current would flow through the circuit.more current would flow through the circuit.
- 7. Multiple ChoiceIn the image, a battery is used to produce a flow of electrons through this circuit. Which of these would cause more current to flow through the circuit?replacing the resistor with a larger onereplacing the battery with a larger onereplacing the battery with a smaller onereplacing the resistor with two equal resistors in series
- 8. Multiple ChoiceA copper wire is wrapped around a solid iron rod many times. In order for this to produce an electromagnet, what must occur?The iron rod must move back and forth.The entire system must be spinning.The end of the copper wires must be in direct contact.There must be electrons flowing through the copper wire.
- 9. Multiple ChoiceAn ohm is best defined as a unit of measure forpower.magnetic fields.electrical resistance.electrical potential difference.
- 10. Multiple ChoiceIf the resistance of a circuit is tripled, then the current through the circuit would be ____.one-third as muchthree times as muchunchanged. ... nonsense! There would be no way to make such a prediction.
- 11. Multiple ChoiceA dry-cell battery produces ____.an alternating currenta direct currentthe same current that a generator producesboth direct and alternating current
- 12. Multiple ChoiceIn this example, R1=R2; as electrons flow through the circuithalf of the electrons flow through R1, and half of the electrons flow through R2more electrons flow through R1, than flow through R2more electrons flow through R2, than flow through R1all electrons flow through R1, and R2
- 13. Multiple ChoiceIn this example, R1=R2=R3; as electrons flow through the circuitone third of electrons flow through R1, one third flow through R2, and one third flow through R3more electrons flow through R1, than flow through R2 and R3most electrons flow through R3all electrons flow through R1, R2, and R3
- 14. Multiple ChoiceThe statement that current is equal to the voltage difference divided by the resistance is known asEinstein's equationFaraday's equationNewton's LawOhm's Law
- 15. Multiple ChoiceA circuit that allows only one path for an electric current is called aparallel circuitparallel currentseries circuitseries current
- 16. Multiple ChoiceElectric charge that has accumulated on an object is referred to ascircuit electricitycurrent circuitcurrent electricitystatic electricity
- 17. Multiple ChoiceA circuit that has two or more branches for electrons to follow is a(n)circuit diagramelectron circuitparallel circuitseries circuit
- 18. Multiple ChoiceCurrent that reverses direction in a regular pattern is calledalternating currentcircuit currentdirect currentmagnetic current
- 19. Multiple ChoiceThe region around a magnet where the magnetic forces act is theelectromagnetic polemagnetic domainmagnetic fieldmagnetic pole
- 20. Multiple ChoiceResistance is measured in a unit called theamperecoulombohmvolt
- 21. Multiple ChoiceObjects that keep their magnetic properties for a long time are calledelectromagnetsmagnetic domainspermanent magnetstemporary magnets
- 22. Multiple ChoiceThe function of an electric motor is to changechemical energy to electrical energyelectrical energy to chemical energyelectrical energy into mechanical energymechanical energy to electrical energy
- 23. Multiple ChoiceThe function of an electric generator is to changechemical energy to electrical energyelectrical energy to chemical energyelectrical energy into mechanical energymechanical energy to electrical energy
- 24. Multiple ChoiceElectromagnetic induction is the process of producing an electric current by moving a loop of wirethrough a magnetic fieldthrough a magnetic domainaround an iron corearound a magnetic pole
- 25. Multiple ChoiceIf a current flowing through a light bulb is 0.75 amperes and the voltage difference across the light bulb is 120 volts, how much resistance does the light bulb have?120.75 ohms0.00625 ohms90 ohms160 ohms
- 26. Multiple ChoiceIf a 9 volt battery powers a resistance in a circuit of 18 ohms, how much current is flowing through the circuit?0.5 amps72 amps2 amps27 amps
- 27. Multiple ChoiceWhich circuit is wired in series?AB
- 28. Multiple ChoiceWhich circuit is wired in parallel?AB
- 29. Multiple ChoiceWhich circuit represents the ways homes are usually wired?AB
- 30. Multiple ChoiceWhich circuit is the type of circuit that causes an entire string of decorative lights to go out when one of the bulbs burns outAB
- 31. Multiple ChoiceThe current in an appliance is 3 A and the voltage difference is 120 V. How much power is being supplied to the appliance?10000 v220 v420 v360 v
- 32. Multiple ChoiceHow does flipping a switch turn a light on?It steps up the voltageIt generates an electromagnetic fieldIt opens a circuitIt closes a circuit
- 33. Multiple ChoiceHow much does it cost to light 6 100 W light bulbs for 6 hours if the price of electrical energy is $0.09/kWh?$4.00$6.24$3.24$5.24
- 34. Multiple ChoiceA kilowatt is1000 Amps1000 watts1000 voltsnone
- 35. Multiple Choicewhat is this symbol for?light bulbswitchbatteryresistor
- 36. Multiple ChoiceThis is the symbol for a ...WireBatteryBuzzerFuse
- 37. Multiple ChoiceThis is the circuit symbol for ...an AC current sourcea DC current sourcean ammetera voltmeter
- 38. Multiple ChoiceThis is the circuit symbol for ...an AC current sourcea DC current sourcean ammetera voltmeter
- 39. Multiple ChoiceIn a parallel circuit, if one connection is broken, all of the connections stop working.TrueFalse
- 40. Multiple Choicethis is the symbol for a _____?switchlightbatterywires
- 41. Multiple ChoiceAn incomplete circuit is shown.
To complete the circuit, a wire should be placed from —Point D to Point CPoint B to Point CPoint A to Point DPoint B to Point D - 42. Multiple ChoiceIf more bulbs are added in series in a series circuit .......less current flowsmore current flowsno current flowsthere is no change in current flow
- 43. Multiple ChoiceWhat is the unit of electric current?AmpOhmVoltWatt
- 44. Multiple Choiceconductorspower sourceturns energy on and offlet electricity flow through easilystop electricity from flowing through easily
- 45. Multiple ChoiceA material that does NOT allow electricity to flow is called _____.a conductora fusean insulatora transformer
- 46. Multiple ChoiceElectrons are generally bound to their atoms and not free to roam around in an insulator.TrueFalse
- 47. Multiple ChoiceElectrostatic force F is directly proportional to:r2 (distance squared)q1q2both q1 and q2
- 48. Multiple ChoiceCalculate the force exerted between two charged objects separated by a distance of 0.6 m. One object has a charge of -5 C and the other has a charge of +2.0 C.-1.5E-11 N2.5E-11 N-2.5E11 N-7.5E-10 N
- 49. Multiple ChoiceFind the magnitude of the force between two charges of 1.0 C each which are 1.0 meter apart?9E-9 N9E9 N1.1E10 N1.1E-10 N
- 50. Multiple ChoiceTwo charges separated by a distance of 1 meter exert a 20-N force on each other. If the charges are pulled to a 2 meter separation distance, the force on each charge will be10 N5 N2.5 N40 N
- 51. Multiple ChoiceThe voltage rise for the battery series is 3 volts. The first bulb has a voltage drop of 2 volts. The voltage drop of the middle bulb is 0.5 volts. What is the voltage drop for the last bulb?3 volts2 volts0.5 volts1 volt
- 52. Multiple ChoiceWhat happens to the total resistance as more resistors are added to a parallel circuit?IncreasesDecreasesStays the sameNo one really knows
- 53. Multiple ChoiceWhat happens to the total current as more resistors are added to a parallel circuit?IncreasesDecreasesStays the sameNo one really knows
- 54. Multiple ChoiceDoes this picture show a series or parallel circuit?series circuitparallel circuit
- 55. Multiple ChoiceWhat would happen if you took one bulb out of a series circuit?The circuit would be closedIt would not change the circuitYou would create a short circuitNone of the other bulbs would light
- 56. Multiple ChoiceParallel Circuit: Battery is 9 V, R1 is 3 Ohms, R2 is 5 Ohms, and R3 is 6 Ohms
Find the total resistance, total current and total voltage for the following circuitVT = 9 V
I T = 3
RT = 14VT = 9
I T = 0.64
RT = 14VT = 9
I T = 6.3
RT = 1.4VT = 9
I T = 0.64
RT = 1.4 - Answer choicesTagsAnswer choicesTags