60. If you walk across a carpet, touch a dooeknob and get a shock, the shock was

Question

60. If you walk across a carpet, touch a dooeknob and get a shock, the shock was the result of a)stat charge. b. useful The static charge that accumulates on clothes in a dryer is a(n)--charge. a nuisance b. useful 61. The static charge sometimes used during spray painting is called a(n) static charge 62. b. useful 63. Selenium is a(n) e. semiconductor 64. The semiconductor material used as a coating on copy machine drums is a. aluminum e. selenium d. silicon 63. Lodestone is a name for a naturally occuring magnetic material that is also called a. lead e. copper d. magnetite 66. The angular difference between true north and magnetic north is known as the angle of a. polarity b. retribution c. declination d. magnetism 67. The north magnetic pole of a compass needle is attracted to themagnetic pole of the earth. a. north b. south c. cast d. west do not require any power of force to maintain their field. a. Electromagnets b. Permanent magnets c. Temporary magnets d. Domain magnets 68. Man-made permanent magnets retain their magnetism a. less 69. than natural magnets. b. Longer

Explanation / Answer

Ans 60 : Since the static charge accumulated on door knob is of No Use, therefore answer is (a) nuisance

Ans 61 : Since the static charge accumulated on clothes in drier is on No Use, therfore answer is (a) nuisance

Ans 62 : Since the static charge in painting helps sticking of colours on painting, therefore answer is (b) useful

Ans 63 : Selenium is a Semiconductor used in photovoltaics. Therefore answer is (c) semiconductor

Ans 64 : The semiconductor material used as a coating on copy machine drums is Selenium. Therefore answer is (c) selenium

Ans 65 : Other name of Lodestone is Magnetite. Therefore answer is (d) magnetite

Ans 66 : The angular difference between true north and magnetic north is known as angle of Declination. Therefore answer is (c) declination

Ans 67 : The north magnetic pole of a compass needle is attracted to the South magnetic pole of the earth. Therefore answer is (b) south

Ans 68 : Permanent Magnets do not require any power of force to maintain their field. Therefore answer is (b) permanent magnet

Ans 69 : Man made permanent magnets retain their magnetism Less than natural magnets. Therefore answer is (a) less

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