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Physics

Physics
Rear view mirror of car is convex or concave?

Both A & B
Convex
Can't be determined
Concave

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Physics
Refrigeration is a process which

Kills bacteria
Slows down the bacterial growth
Inactivates the bacteria
Plasmolyses the bacteria

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Physics
Q = mcdT refers to

Heat of Vaporization
Enthalpy formula
Heat Transfer formula
Specific Heat formula

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Physics
Which of the following is the unit of Astronomical Distance ?

Metre/sec
Parsec
Sec
Para/sec

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Physics
A wire of copper having length I and area of cross-section A is taken and a current i is flown through it. The power dissipated in the wire is P. If we take an aluminium wire having same dimensions and pass the same current through it, the power dissipated will be

2P
P
< P
> P

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Physics
Let a thin capillary tube be replaced with another tube of insufficient length then, we find water

will overflow
change its meniscus
depressed
will not rise

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