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Physics

Physics
Sound of frequency below 20 Hz is called

infrasonic
audio sounds
ultrasonic
supersonics

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Physics
In a diesel engine the high temperature needed to ignite the fuel is achieved by

An electrical spark
Using heat from exhaust
Compressing air in the cylinders
The battery

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Physics
Stars appear twinkling because of ......... of light.

Emission
Absorption
Reflection
Scattering

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Physics
Which one of the following physical quantities has the same dimensions as that of Planck's constant?

Potential energy
Angular momentum
Linear momentum
Force

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Physics
A circular plate, a cube and a sphere, all made up of same material and having the samemass, are heated to 300°C and left in a room. Which of them will have the slowest rate of cooling?

Sphere
All will cool at the same rate
Cube
Circular plate

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Physics
Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules in

Convection
Conduction
Both conduction and convection
Radiation

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MORE MCQ ON Physics

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