Thursday, February 27, 2020

WBCS Polity and Constitution MCQs Prelims and Mains

online mcq test Physics For UPSC | SSC | Rail | RRB | State PSC | class 12 P21


Physics - 21

101. The principle underlying a microwave oven is
(A) Microwaves are similar to thermal radiation.
(B) Microwaves vibrate the water molecules in food thereby generating heat.
(C) The heat generated by nuclear power
(D) Not fully understood

Correct Answer: [B] Microwaves vibrate the water molecules in food thereby generating heat..
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102. Basically domestic electric wiring is a
(A) Combination of series and parallel connections.
(B) Series connection
(C) Parallel connection
(D) None of the above

Correct Answer: [C] Parallel connection.
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103. The production of shadow proves that
(A) Light is a type of particle.
(B) Light does not diffract
(C) Light travels approximately is straight lines.
(D) Light is an electromagnetic wave

Correct Answer: [C] Light travels approximately is straight lines..
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104. Which surface is a good absorber of heat?
(A) White smooth surface
(B) Black smooth surface
(C) White rough surface
(D) Black rough surface

Correct Answer: [D] Black rough surface.
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105. Hubble is a
(A) Space telescope
(B) Star
(C) Nuclear weapon
(D) Musical instrument

Correct Answer: [A] Space telescope.
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