Physics - 30
146. Production of beats is a result of the phenomenon of
(A) Reflection
(B) Superposition
(C) Resonance
(D) Interference
(A) Reflection
(B) Superposition
(C) Resonance
(D) Interference
Correct Answer: [D] Interference.
147. The viewfinder of a motor car is a
(A) Convex mirror
(B) Convex lens
(C) Plane mirror
(D) Concave mirror
(A) Convex mirror
(B) Convex lens
(C) Plane mirror
(D) Concave mirror
Correct Answer: [A] Convex mirror.
148. Which of the rays is most dangerous?
(A) Gamma-ray
(B) X-ray
(C) Alpha ray
(D) Beta ray
(A) Gamma-ray
(B) X-ray
(C) Alpha ray
(D) Beta ray
Correct Answer: [A] Gamma-ray.
149. The reaction that occurs in nuclear reactors is
(A) Nuclear fission
(B) Nuclear isomerization
(C) Nuclear fusion
(D) Spallation
(A) Nuclear fission
(B) Nuclear isomerization
(C) Nuclear fusion
(D) Spallation
Correct Answer: [A] Nuclear fission.
150. Astronomy means the study of the
(A) Sky
(B) Sun
(C) Moon
(D) Stars
(A) Sky
(B) Sun
(C) Moon
(D) Stars
Correct Answer: [D] Stars.
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