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Physics

Physics
Sound becomes hazardous noise pollution at decibels?

Above 50 db
Above 30 db
Above 80 db
Above 120 db

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

Magnetic wave
Sound wave
X-ray
Ultra-sound wave

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Physics
The complete form of 'IC' in electronics is

Inbuilt circuit
Internal circuit
Independent circuit
Integrated circuit

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Physics
A person does some work of 1,000 J in 2 s. His power will be ________

1000W
50W
500W
25W

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Physics
Hydraulic machines work under the Principle of :

Pascal's Law
Newton's Law
Floatation Law
Joules Law

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Physics
The sounds having a frequency of 20 Hertz to 20,000 Hertz are known as

Ultrasonics
Infrasonics
Audible sounds
Megasonics

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