Physics
The device used to convert solar energy into electricity is

Daniell cell
Electrochemical cell
Photovoltaic cell
Galvanic cell

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Physics
Superconductors are substances which

conduct electricity at low temperature
conduct electricity at high temperatures
offer no resistance to the flow of electricity
offer high resistance to the flow of current

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Physics
A transformer

Converts electrical energy into mechanical energy
Converts AC voltage to D.C. voltage
Is used to decrease or increase AC voltage
Converts DC to AC

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