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Physics - 20

96. Which among the following is paramagnetic?
(A) CO2
(B) SO2
(C) H2O
(D) NO

Correct Answer: [D] NO.

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97. Some automobiles have additional yellow headlights. This is so because
(A) Yellow light is able to penetrate fog, thus it is able to illuminate the road better in foggy nights.
(B) The automobile looks more imposing with yellow headlights.
(C) Yellow light consumes less power.
(D) Yellow light does not produce a dazzling effect in the eyes of the pedestrians

Correct Answer: [A] Yellow light is able to penetrate fog, thus it is able to illuminate the road better in foggy nights..

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98. X-rays are
(A) beams of electrons
(B) visible to the naked eye
(C) electromagnetic radiations of very short wavelength
(D) electromagnetic radiations of very long wavelength

Correct Answer: [C] electromagnetic radiations of very short wavelength.

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99. Which one of the following is not an electromagnetic wave?
(A) Visible light
(B) Sound wave
(C) Radio wave
(D) X-ray

Correct Answer: [B] Sound wave.

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100. RADAR' stands for
(A) Range Detection Appliance for Airplane Ranging
(B) Ready Advanced Airplane Ranging
(C) Radio Detection and Ranging
(D) Ready Advanced Appliance for Ranging

Correct Answer: [C] Radio Detection and Ranging.

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