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Physics

Physics
Which colour is the complementary colour of yellow ?

Orange
Green
Blue
Red

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Physics
Bats can sense obstacles because they produce

Infrasonic sound waves
Supersonic sound waves
Micro sound waves
Ultrasonic sound waves

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Physics
A bucket of water is hung from a spring balance. A piece of iron is suspended in the water without touching the sides or touching the bottom of the bucket. The reading of the spring balance

Does not change
Will increase
Varies with the increase of depth of the immersion of the iron piece
Will decrease

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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
7C
C
C/7

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Physics
An electric fuse is based on

The magnetic effect of the current
The chemical effect of the current
All of these
The heating effect of the current

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Physics
A radioactive substance does not undergo any change (in mass or charge) during

Beta-emission
Gamma-emission
Alpha-emission
Oxidation

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MORE MCQ ON Physics

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