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Physics

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

Magnetic wave
Ultra-sound wave
Sound wave
X-ray

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Physics
In the Earth, the weight of a body is maximum at the

Surface
Equator
North Pole
South Pole

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Physics
What is the other name of Galileo's law of falling bodies?

Law of motion
Newton's first law
Newton's third law
Newton's second law

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Physics
Anemometer is an instrument meant for measuring ________

Air masses
Wind speed
Temperature
Velocity

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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
Which of the following is not true about X-rays?

Travel with the speed of light
Have low penetrating power
Can be reflected or refracted
Can affect photographic plates

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