Physics
Optical Fibre technology works on which of these principles of Physics?

Total internal reflection of Light
Newton's law of Motion
Photoelectric effect
Bernoulli's Principle

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Physics
To resolve an object in an electron microscope,

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

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Physics
The nature of fuse wire is

Low resistance and high melting point.
High resistance and high melting point.
High resistance and low melting point.
Low resistance and low melting point.

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