Semiconductors | Quiz-01

In a semiconductor crystal, the number of free electrons (n_e) = 7 x 10¹¹ per cubic meter and the number of holes (n_h) = 5 x 10¹² per cubic meter. The semiconductor crystal is-

Assertion- Silicon is preferred over germanium for making semiconductor devices.
Reason- The energy gap in germanium is more than the energy gap in silicon.

Assertion- A pure semiconductor has negative temperature coefficient of resistance.
Reason- On raising the temperature, more charge carriers are released, conductance increases and resistance decreases.