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Physics

Physics
Which of the following has the highest frequency?

Cosmic rays
X-rays
Radio waves
Microwaves

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Physics
What is the escape velocity of the rocket in the earth?

12.2 km/sec
10.2 km/sec
13.2 km/sec
11.2 km/sec

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Physics
________ states that internal energy is a function of state and the increase in internal energy is equal to the sum of the heat supplied to system and work done by the system.

Hooke's Law
The coulomb's law
Faraday's Law
First law of thermodynamics

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Physics
In the atmosphere ultraviolet rays are absorbed by

Nitrogen
Ozone
Helium
Oxygen

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Physics
In which of the following cases, kinetic energy is being used in performing work ?

Driving a car to cover a distance
Paddling the bicycle to cover a distance
Wind mill grinding wheat grain
Rowing a boat in the lake

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Physics
A parallel-plate capacitor,with air in between the plates, has capacitance C. Now the space between the two plates of the capacitor is filled with a dielectric of dielectric constant 7. Then the value of the capacitance will become

C/7
C
14C
7C

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