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Physics

Physics
Where are mesons found ?

X-rays
Cosmic rays
Laser beam
Gamma rays

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Physics
Working of safety fuses depends upon1. magnetic effect of the current2. chemical effect of the current3. magnitude of the current4. heating effect of the currentSelect the correct answer using the code given below.

4 only
3 and 4 only
1, 2 and 3 only
1, 2, 3 and 4

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Physics
How many bottles of water is a gallon?

2
4
8
16

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Physics
Photon is the fundamental unit/quantum of

Magnetism
Electricity
Light
Gravitation

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Physics
A copper wire of radius r and length l has a resistance of R. A second copper wire with radius 2r and length l is taken and the two wires are joined in a parallel combination. The resultant resistance of the parallel combination of the two wires will be

5 R/4
4 R/5
5 R
R/5

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Physics
The propagation of sound waves in a gas involves

Isochoric compression and rarefaction
Isobaric compression and rarefaction
Isothermal compression and rarefaction
Adiabatic compression and rarefaction

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