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Physics

Physics
The plastic material commonly used for making gear wheels is

Polystyrene
Polyesters
Bakelit
Nylons

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Physics
The composition of electrician solder is

Steel-37%, copper-63%
Lead-37%, Steel-63%
Lead-37%, tin-63%
Iron-37%, tin-63%

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Physics
An image formed by a plane mirror, that cannot be obtained on a screen is called ________

Real image
Inverted image
Erect image
Virtual image

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Physics
Which phase change is an example of an exothermic process?

Gas to Liquid
Gas to Solid
All listed here
Liquid to Solid

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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?

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

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Physics
The colours of stars depend on their

Radius
Temperature
Atmospheric pressure
Distance

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