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Physics

Physics
The sharpness of a television image is termed as its

Graphics
Colour
Resolution
Clarity

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Physics
Magnetism at the centre of a bar magnet is

maximum
zero
minimum or maximum
minimum

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Physics
A parallel-plate capacitor of capacitance C1 is made using two gold plates. Another parallel-plate capacitor of capacitance C2 is made using two aluminium plates with same plate separation, and all the four plates are of same area. If rg and ra are respectively the electrical resistivities of gold and aluminium, then which one of the following relations is correct?

C1>C2
C1 = C2
C1pa = C2pg
C2>C1

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Physics
Dioptre is the unit of

Sound intensity
Focal length of a lens
Power of a lens
Light intensity

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Physics
When water freezes its density

Decreases
Becomes Zero
Increases
Remains constant

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Physics
The sparkling of a diamond is due to

Interference of light
Polarisation of light
Total internal reflection of light
Refraction of light

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