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Summative Test in Science V

A. Choose the letter of the best answer.

1. When an object gains electrons it becomes__________________.a. Unchargedb. ositivel! chargedc. "egativel! charged

d. "ot totall! charged

#. When an object loses electrons$ it becomes__________________.a. Unchargedb. ositivel! chargedc. "egativel! chargedd. "ot totall! charged

%. Which this s!mbols stands for &ositivel! charge'a. (b. )

c. *d. +

,. Which of these is a source of electrical energ!'a. -atter!b. am&c. ightd. ed

/. Which of these controls electric current'a. Switchb. -atter!c. 0eneratord. Transmitter

. "ina switch 23"4 the 5uorescent lam&. When "ina switch on the light$ the electriccircuit is'a. 3&enb. Closedc. -ro6end. 7ncom&lete

8. Which of the circuit will &roduce light for a bulb'a. Short circuitb. 3&en circuitc. Closed circuitd. 7ncom&lete circuit

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9. 7f a defective bulb causes the other bulbs not to get lighted$ the electric circuitis_____________.

a. Series circuitb. arallel circuitc. -ro6en circuitd. 7ncom&lete Circuit

:. 7f !ou want all the electric bulbs in !our lawn to be lighted at the same time what

6ind of connection should !ou use'a. Series circuitb. arallel circuitc. -ro6en circuitd. 7ncom&lete circuit

1*. Which household heating device &roduces both heat and light'a. ;lectric fanb. ;lectric stovec. ;lectric water heaterd. ;lectric microchi& s6i&&er

11. Which of these is encountered b! the electrons while 5owing through aconductor'a. ;esistanced. Transmitter

1#. Which of these an electromagnet &ic6 u&'a. encilb. lasticc. Thumb tac6sd. ong bond &a&er

1%. What 6ind of magnet is an electromagnet'a. ermanentb. Tem&orar!c. Semi?&ermanentd. Semi?tem&orar!

1,. Which of these is a lever'a. Crowbarb. Screwc. @nifed. in

1/. Which of these is NOT an inclined &lane'a. >am&b. Stairsc. Slided. Crowbar

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1. What does a &ulle! s!stem with two strings su&&orting the movable &ulle!do to the e