General Science MCQs Part III
21 Transformer is not an amplifier because of
No power gain
22 The essential difference between an A.C dynamo and a D.C dynamo is that
A.C has slip rings but D.C has a commutator
23 Two objects that lose the same weight in water must have the same
Volume
24 The name of Madam Curie is associated with the discovery of
Radium
25 What is the speed of sound under normal conditions?
1100 feet per second (750 miles per hour)
26 Petrol and Diesel are the examples of
Potential energy
27 An allergy is
An excessive sensitiveness to some food or substances
28 Penicillin was discovered by
Alexander Fleming
29 When a body is thrown upwards, its velocity goes on
Decreasing
30 A rodent is an animal that has
Long sharp front teeth
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