Physics
To resolve an object in an electron microscope,

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

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Physics
It is easier to roll a stone up a sloping road than to lift it vertical upwards because

Work done in rolling a stone is less than in lifting it.
Work done in both is same but the rate of doing work is less in rolling.
Work done in rolling is more than in lifting.
Work done in lifting the stone is equal to rolling it.

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