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Physics

Physics
In MRI machine, which one of the following is used?

Magnetic wave
Ultra-sound wave
X-ray
Sound wave

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Physics
The speed of sound travel fastest through

Solid
Liquid
Gas
None of these

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Physics
The unit of Planck's constant is

Js–2
Js
J/s
Js2

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Physics
The reverse effect of X–ray emission is

Raman effect
Zeeman effect
Compton effect
Photoelectric

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Physics
The force between charged particles is called as:

Centrifugal Force
Nuclear Force
Gravitational Force
Electromagnetic Force

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Physics
Sound produced at a point is heard by a person after 5 second, while the same sound is heard by another person after 6 seconds. If the speed of sound is 300 m/s, what could be the maximum and minimum distances between the two persons?

3.3 km, 0.30 km
2.8 km, 0.25 km
2.2 km, 0.20 km
1.8 km, 0.15 km

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