A gas is expanded adiabatically. In this process:

No heat is exchanged with the surroundings

The temperature of the gas remains constant

In a semiconductor device, the depletion region is:

A region devoid of free charge carriers

A region with an excess of free electrons

A region with an excess of holes

A region with a high concentration of impurity atoms

At 12 cm from the lens, virtual

At 60 cm from the lens, virtual

The absolute temperature and the number of molecules

The square root of the absolute temperature and the number of molecules

The absolute temperature and the square of the number of molecules

The square of the absolute temperature and the number of molecules

A circular path bending downwards.

A circular path bending upwards.

A parabolic path bending downwards.

A p-n junction diode in forward bias.

A Zener diode in reverse breakdown.

A tunnel diode in forward bias.

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