Physics - 23
111. If the focal length of the objective of an astronomical telescope increases, then its magnifying power will
(A) Remain the same
(B) Can not be predicted
(C) Increase
(D) Decrease
(A) Remain the same
(B) Can not be predicted
(C) Increase
(D) Decrease
Correct Answer: [C] Increase.
112. The internal resistance of which of the instruments is the highest?
(A) Voltmeter
(B) Mili ammeter
(C) Galvanometer
(D) Ammeter
(A) Voltmeter
(B) Mili ammeter
(C) Galvanometer
(D) Ammeter
Correct Answer: [A] Voltmeter.
113. Water rises up a capillary tube because of
(A) Viscosity
(B) it's density
(C) Elasticity
(D) Surface tension
(A) Viscosity
(B) it's density
(C) Elasticity
(D) Surface tension
Correct Answer: [D] Surface tension.
114. At what temperature, the mass of pure water of volume 1 cubic centimeter is 1 gm?
(A) 4°C
(B) 9°C
(C) 0°C
(D) 3°C
(A) 4°C
(B) 9°C
(C) 0°C
(D) 3°C
Correct Answer: [A] 4°C.
115. The image formed by a plane mirror is
(A) virtual and erect
(B) real and inverted
(C) real and erect
(D) virtual and inverted
(A) virtual and erect
(B) real and inverted
(C) real and erect
(D) virtual and inverted
Correct Answer: [A] virtual and erect.
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