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Physics
11.
The basic reason for the extraordinary sparkle of suitably cut diamond is that
- A.it has a very high transparency
- B.it has a very high refractive index
- C.it is very hard
- D.it has well defined cleavage planes
- Answer
- Report
Answer : [B]
12.
The speed of light will be minimum while passing through
- A.glass
- C.water
- B.vacuum
- D.air
- Answer
- Report
Answer : [A]
13.
In an electronic watch, the component corresponding to pendulum of a pendulum clock is a
- A.transistor
- C.diode
- B.crystal oscillator
- D.balance wheel
- Answer
- Report
Answer : [B]
14.
The difference between a nuclear reactor and an atomic bomb is that
- A.no chain reaction takes place in nuclear reactor, while in the atomic bomb there is a chain reaction
- B.the chain reaction in nuclear reactor is controlled
- C.the chain reaction in nuclear reactor is not controlled
- D.no chain reaction takes place in atomic bomb while it takes place in nuclear reactor
- Answer
- Report
Answer : [B]
15.
An air bubble in water will act like a
- A.convex mirror
- C.concave mirror
- B.convex lens
- D.concave lens
- Answer
- Report
Answer : [D]
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