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Physics

Physics
The speed of sound travel fastest through

Solid
Gas
None of these
Liquid

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Physics
A passenger standing in a bus is thrown outward when the bus takes a sudden turn. This happens due to

Outward pull on him
Inertia of motion
Change in momentum
Change in acceleration

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Physics
Which of the following statements is true when we see ''rainbow' ?

The Sun remains behind us and we face raindrops
The sky remains clear and the sun is at lower position in the sky
We face sun and raindrops
In light rainfall, we face Sun

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Physics
A parallel-plate capacitor,with air in between the plates, has capacitance C. Now the space between the two plates of the capacitor is filled with a dielectric of dielectric constant 7. Then the value of the capacitance will become

14C
C/7
C
7C

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Physics
Transformer is a device to convert

Low voltage D.C. into high voltage D.C.
Low voltage A.C. into high voltage A.C.
C. to A.C.
Mechanical energy into Electrical energy

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Physics
Minimum number of unequal vectors which can give zero resultant are

three
more than four
two
four

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