GRADE 8 SCIENCE QUIZ: Electricity [PDF]

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GRADE 8 SCIENCE



UNIT 1: MODULE 4 - Electricity I. MULTIPLE CHOICE. Encircle the letter of the best answer. 1) Which of the following are the three quantities we should be familiar with in the study of electricity? a. work, power, energy b. mass, heat, temperature c. speed, velocity, acceleration d. current, voltage, resistance 2) Why do we need a switch in most electric circuits? a. We include a switch in an electric circuit so that we can control the flow of electricity. b. We include a switch in an electric circuit so that people can electrocute themselves. c. We include a switch in an electric circuit so that the current will flow forever. d. None of the above is the correct answer. 3) It refers to the flow or measure of electrical charges passing through a conductor in a given time. a. current b. voltage c. resistance d. power 4) Which SI unit is used to measure electric current? a. ampere (A) b. volt (V) c. ohm (Ω)







d. watt (W)



5) It is a measure of the difference in electrical potential (potential difference) between two points in an electric circuit. a. current b. voltage c. resistance d. power 6) Which type of circuit is formed when the components are arranged in a manner where there is only a single path for the current to take? a. series circuit b. parallel circuit c. short circuit d. open circuit 7) Which SI unit is used to measure voltage? a. ampere (A) b. volt (V)



c. ohm (Ω)







d. watt (W)



8) It is the ability or force which restricts, resists or opposes the flow of electrons (electric current) in a circuit. a. current b. voltage c. resistance d. power 9) Which type of circuit is formed when the components are arranged in a manner where there is more than one path for the current to take? a. series circuit b. parallel circuit c. short circuit d. open circuit 10) Which SI unit is used to measure resistance? a. ampere (A) b. volt (V)



c. ohm (Ω)







d. watt (W)



II. IDENTIFICATION. Determine and choose from the box the letter of the best answer to an item. A. ammeter B. short circuit C. Ohm’s law D. voltmeter E. open circuit _____________ 1) It is an instrument used to measure the amount of electric current flowing through a circuit. _____________ 2) This occurs when there is a shortened path for the circuit or when resistance is greater. _____________ 3) This law can also be clearly defined by the equation: V = IR _____________ 4) It is an instrument used to measure the potential difference (voltage) between points in a circuit. _____________ 5) The condition wherein the circuit’s loop isn’t fully connected because of broken connections.