The minority carrier life time and diffusion constant in a semiconducting material are 100 μs and 100 cm2/s respectively. The diffusion length of carriers is
A.
0.1 cm
B.
0.01 cm
C.
0.0141 cm
D.
1 cm
Answer: Option A
Explanation:
Diffusion length = sqrt(Carrier life time x Diffusion constant) = (100 x 10-6 x 100)0.5 = 0.1 cm.
Two materials having temperature coefficients of 0.004 and 0.0004 respectively are joined in series. The overall temperature coefficient is likely to be
A.
0.08
B.
0.04
C.
0.001
D.
0.0001
Answer: Option C
Explanation:
The overall temperature coefficient will be less than 0.004 and more than 0.0004.