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Physics

Physics
Which one of the following is an ohmic conductor?

Germanium
Carbon
Silicon
Silver

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Physics
Hydroscope is an instrument that shows changes in:

Density of liquid
None of these
Sound under water
Atmospheric humidity

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Physics
The oldest type of energy known to man is

Solar power
Geothermal energy
Wind power
Tidal energy

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Physics
In superconductors, the energy gap is due to

Electron-phonon interaction
Electron-electron interaction
Phonon-phonon interaction
Electron-photon intercation

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Physics
Sound becomes hazardous noise pollution at decibels?

Above 50 db
Above 120 db
Above 30 db
Above 80 db

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Physics
Which of the following is preferred for accelerating electrons?

Cyclotron
Synchrotron
Van de Graft Generator
Betatron

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