Physics
A man stands on the pan of a balance holding a fish in his right hand and bucket of water in his left hand. If he transfers the fish into the bucket, the total weight on the pan

Remains the same
Increases
Decreases
First increases and then decreases

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Physics
When a piece of pure silicon is doped with aluminium, then

The resistivity of the doped silicon piece will increase
The doped silicon piece will become p-type
The conductivity of the doped silicon piece will remain the same
The doped silicon piece will become n-type

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