Physics
To resolve an object in an electron microscope,

Both A & B
The wavelength of the electrons must be close to the diameter of the object
None of these
The wavelength of the electrons must be greater than the diameter of the object.

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Physics
Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open

at a place in a valley below sea level
at the top of Mt. Everest
in an aeroplane flying at a height of 10,000 m with inside pressure maintained at the sea level
at sea level

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