Physics
Which of the following features of a tunnel diode is its drawback

Extremely high frequency response
Instability due to negative resistance
Very wide temperature range of operations
Very low power consumptions

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Physics
Superconductors are those elements

Whose conductivity is intermediate between metals and insulators
Which conduct electricity only at super-high temperatures
Whose resistance falls almost to zero at very low temperatures
Which turn into insulators at very low temperatures

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Physics
What is a neuron ?

Particle released during radioactivity
Basic unit of energy
Basic unit of nervous system
The anti-particle of neutron

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