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Home
All Subjects
CSS
CSS MPT
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CSS Past Papers
Past Papers
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Departmental Past Papers
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FPSC
PPSC
SPSC
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KPPSC
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Subject:
Physics
Quartz crystal in quartz watches work on the principle called?
A.
Photoelectric effect
B.
Stark effect
C.
Thermionic effect
D.
Piezo-electric effect
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