Question

In an n-p-n transistor, the majority carriers in the base are

a.Electrons

b.Holes

c.Both holes and electrons

d.Either holes or electrons

Answer 1

Answer:

options b is right

ie hole

Answer 2

$\sf{\huge{\pink{\underline{\underline{Answer :}}}}}$

• In an NPN transistor, when positive bias is applied to the base emitter junction, the equilibrium is disturbed between the thermally generated carriers and the repelling electric field of the n-doped emitter depletion region.

• This allows thermally excited electrons to inject from the emitter into the base region. These electrons diffuse through the base from the region of high concentration near the emitter towards the region of low concentration near the collector.

• The electrons in the base are called minority carriers because the base is doped p-type, which makes holes the majority carrier in the base.