Refrigerator works on the phenomenon of ________ of heat transfer....? Mcqs

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Refrigerator works on the phenomenon of ________ of heat transfer....?

(A) Conduction
(B) Convection

(C) Radiation
(D) All of these

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A man is standing on a weighing machine in a lift which is moving. The weighing machine will slow MINIMUM reading when, the lift is moving...?

(A) Upward with uniform speed
(B) Downward with uniform acceleration

(C) In a free fall due to failure of the lift mechanism
(D) None of these

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Internal friction of fluid is called_________...?

(A) Viscosity
(B) Surface tension

(C) Resistance
(D) Cohesive force

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When the wire is connected and bulb is lit, this is called...?

(A) Open Circuit
(B) Close Circuit

(C) Short Circuit
(D) Series Circuit

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When an object is placed very close to a concave mirror its image will be...?

(A) Virtual
(B) Upright

(C) Larger in size than the object
(D) All of these

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Snail belongs to which of the following phylum...?

(A) Annelida
(B) Arthropoda

(C) Mollusca
(D) Echinodermata

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Approximate age of sun is _________...?

(A) 4.4 billion years
(B) 4.5 billion years

(C) 4.6 billion years
(D) 4.7 billion years

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Most important effect of the moon on earth is that it___________...?

(A) Causes weather change
(B) Causes earthquakes

(C) Causes solar and lunar eclipse
(D) Effects tides of the ocean

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The meaning of Echoes is _______...?

(A) Repeating sounds
(B) Refracted sounds

(C) Absorbed sounds
(D) Amplified sounds

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Which of the following circuit elements is used to ‘block’ DC in an electronic circuit ...?

(A) Resistances
(B) Capacitance

(C) Inductance
(D) Diode

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