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

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
The velocity of electron is smaller than that of visible light

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Physics
What is the direction of torque?

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

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