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Physics

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

Magnetic wave
Sound wave
Ultra-sound wave
X-ray

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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.

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

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Physics
Where is a transistor most likely to be found ?

Wrist watch
Hearing aid
Fuse
Fluorescent lamp

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Physics
Proton carry a

Positive Charge
Variable Charge
Neutral Charge
Negative Charge

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Physics
Coolis tube is used to produce

Micro waves
Gama rays
Radio waves
X-rays

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Physics
What is the minimum velocity required for a rocket to overcome earth's gravity and travel into space?

11.2 km/sec
21 km/sec
35 km/sec
18 km/sec

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