Online Physics MCQs

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71. The device that converts alternating current (AC) to direct current (DC) is
(A) inverter
(B) converter
(C) rectifier
(D) amplifier

72. The device that converts direct current (DC) to alternating current (AC) is
(A) inverter
(B) converter
(C) rectifier
(D) amplifier

73. What is the rest energy of a substance of mass 2 kg?
(A) 10 × 1012 joule
(B) 10 × 1016 joule
(C) 18 × 1012 joule
(D) 18 × 1016 joule

74. If a force acting on an object of mass 12 kg produces an acceleration of 5 m/s2. Then the same force applied to an object of mass 10 kg will produce an acceleration of _____ m/s2.
(A) 5
(B) 6
(C) 7
(D) 8

75. The mass of the Earth is
(A) 5.98×1020 kg
(B) 5.98×1022 kg
(C) 5.98×1024 kg
(D) 5.98×1026 kg

ANSWERS: ONLINE PHYSICS MCQS
71. (C) rectifier
72. (A) inverter
73. (D) 18 × 1016 joule
74. (B) 6
75. (C) 5.98×1024 kg