Physics
When a vibrating tuning fork is placed on a table, a loud sound is heard. This is due to :

Damped vibrations
Forced vibrations
Reflection
Refraction

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Physics
An electron microscope gives higher magnification than an optical microscope, because :

The velocity of electron is smaller than that of visible light
The wavelength of electrons is smaller as compared to the wavelength of visible light
It uses more powerful lenses
The electrons have more energy than the light particles

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Physics
What is the direction of torque?

Opposite to the direction of applied force
Same as the direction of applied force
Perpendicular to the direction of applied force
Parallel to the radius

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