1) An instrument that gives an accurate measurement of the electric current flowing in a circuit is known as a. voltmeter b. galvanometer c. barometer d. ammeter
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2) A magnet may attract or repel by a. another magnet b. electric current c. resistor d. dynamo
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3) Compared to long thick wire of copper, the short but thick wire would have a. more resistivity b. less resistivity c. equal resistivity d. may have more or less resistivity
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4) Current can only flow if there is a closed circuit a. open circuit b. closed circuit c. series circuit d. parallel circuit
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5) If someone carrying a knife or gun passes through a detector, it alters the rate of a. current b. voltage c. resistance d. magnetic field
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6) The electromagnet consists of a coil of wire with a. steel magnet in it b. iron magnet in it c. steel magnet above it d. iron magnet below it
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7) In parallel circuit, the current is a. equal b. unequal c. more powerful d. less powerful
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8) In conductors, electrons can flow because their a. ions are free b. protons are free c. electrons are free d. negative ions are free
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9) Poor conductor of electricity is a. silver b. aluminum c. water d. copper
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10) Earth wire is connected to the a. ground b. appliance c. power house d. transformer
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11) Another example of 'electromagnets' in trains is a. bullet train b. passenger train c. maglev train d. cargo train
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12) Turning off a switch also put the bulb off, this is because the circuit is a. cooled down b. not complete c. joined d. unbroken
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13) 'Earphones' are a. magnets b. small loudspeakers c. soft speakers d. magnetized speakers
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14) In 1 minute, 1kW electric fire uses 10 times as much energy as a a. 1W LED light b. 10W LED light c. 100W bulb d. 0.1W RC Car
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15) Electrons release energy in the form of a. heat energy b. thermal energy c. sound energy d. light energy
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16) Some appliances cost more because they need more a. power b. space c. energy d. electricity
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17) As electrons pass through a bulb, they use a. energy b. charge c. power d. resistance
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18) Fuses work only a. in daylight b. twice c. once d. in moonlight
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19) When small hammer is attracted by electromagnet, the bell a. sparks b. vibrates c. stops d. strucks
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20) William Sturgeon made first electromagnet in a. 1820 b. 1825 c. 1920 d. 1925
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