Physics
In a photocell light energy is converted into

Electrical energy
Chemical energy
Potential energy
Heat energy

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Physics
A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that

The initial momentum of the rubber ball is greater than that of the metal ball
The metal ball suffers greater change in momentum
Both suffer the same change in momentum
The rubber ball suffers greater change in momentum

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Physics
Super conductors are substances that

Offer high resistance to the flow of electric current
Conduct electricity at high temperature
Conduct electricity at low temperature
Offer minimum resistance to flow of electric current

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