Silicon Is One of the Group IV Semiconductors and Has

question 12

Multiple Choice

Silicon is one of the Group IV semiconductors and has an energy gap of 1.12 eV.Generally only metals have highly shiny surface,yet as shown in the figure,silicon appears to reflect like a metal.This is because

• A)silicon is a good semiconductor with a well defined energy gap.
• B)visible light has energies in the range 2-3 eV which is much larger than the energy gap allowing electrons to be promoted from the valence band to the conduction band.
• C)the surface of silicon is smooth making it reflect like a metal.
• D)silicon can be grown in very high purity.It is the impurities that make a semiconductor dull looking.
• E)None of these is correct.

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Definitions:

Transmission Cooler

A device used to cool the automatic transmission fluid, helping to prevent overheating and prolong the transmission's life.

Gear Ratios

The ratio of the rotational speeds of two or more interconnected gears, determining the output speed and torque in relation to the input.

Torque Output

The measure of the twisting force an engine or motor produces, typically stated in Newton-meters (Nm) or foot-pounds (ft-lb), influencing the vehicle's acceleration and load capacity.

Engine Speed

The rate at which an engine's crankshaft is turning, typically measured in revolutions per minute (RPM).