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

High melting point
Low resistance
Low melting point
Low work function

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Physics
A drop of liquid assumes spherical shape because:

Inter molecular forces are weak in liquids
A sphere has the least surface area for a given volume
Intermolecular forces are strong in liquids
A sphere has the largest surface area for a given volume

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