Physics
For photoelectric effect to take place, the metal used as the cathode should have ________

High melting point
Low resistance
Low work function
Low melting point

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Physics
A Fuse wire is characterised by

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

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Physics
What is a compound microscope?

A microscope that has one lens.
A microscope whose lenses are concave.
A microscope whose lenses are convex.
A microscope that has two sets of lenses : an occular lens and an eyepiece.

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