Thursday, February 27, 2020

WBCS Polity and Constitution MCQs Prelims and Mains

Physics questions quizlet For UPSC | SSC | Rail | RRB | State PSC P30


Physics - 30

146. Production of beats is a result of the phenomenon of
(A) Reflection
(B) Superposition
(C) Resonance
(D) Interference

Correct Answer: [D] Interference.
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147. The viewfinder of a motor car is a
(A) Convex mirror
(B) Convex lens
(C) Plane mirror
(D) Concave mirror

Correct Answer: [A] Convex mirror.
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148. Which of the rays is most dangerous?
(A) Gamma-ray
(B) X-ray
(C) Alpha ray
(D) Beta ray

Correct Answer: [A] Gamma-ray.
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149. The reaction that occurs in nuclear reactors is
(A) Nuclear fission
(B) Nuclear isomerization
(C) Nuclear fusion
(D) Spallation

Correct Answer: [A] Nuclear fission.
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150. Astronomy means the study of the
(A) Sky
(B) Sun
(C) Moon
(D) Stars

Correct Answer: [D] Stars.
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