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6.
The working of the quartz crystal in the watch is based on the
- A.Photoelectric Effect
- C.Piezo - electric Effect
- B.Johnson Effect
- D.Edison Effect
- Answer
- Report
Answer : [C]
7.
Which one of the following is not an astronomical object ?
- A.Pulsar
- C.Black Hole
- B.Brittle Star
- D.Quasar
- Answer
- Report
Answer : [B]
8.
The information of brilliant colours in a thin soap film is a consequence of the phenomena of
- A.Multiple reflection and interference
- B.Multiple refraction and dispersion
- C.Diffraction and dispersion
- D.Polarisation and interference
- Answer
- Report
Answer : [A]
9.
In case of uniform circular motion, the acceleration is
- A.Zero
- B.Constant in magnitude and directed radially inwards
- C.Variable in magnitude but constant in direction
- D.Variable in magnitude but tangential to the circle
- Answer
- Report
Answer : [C]
10.
A corked bottle full of water when frozen will break because
- A.The bottle contracts on freezing
- B.The volume of water decreases on freezing
- C.The volume of water increases on freezing
- D.glass is a bad conductor of heat
- Answer
- Report
Answer : [C]
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