Physics
A bird sitting on a high tension electric wire does not get electrocuted because

It has high resistance
Its feet are good insulators
The body is earthed
It does not form a closed path for the flow of current

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Physics
Acceleration is

Directly proportional to force
Directly proportional to mass
Inversely proportional to force
Inversely proportional to mass

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Physics
The nature of fuse wire is

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

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