1
AIEEE 2006
MCQ (Single Correct Answer)
+4
-1
If the lattice constant of this semiconductor is decreased, then which of the following is correct? AIEEE 2006 Physics - Semiconductor Question 179 English
A
All $${E_c},{E_g},{E_v}$$ increase
B
$${E_c}$$ and $${E_v}$$ increase, but $${E_g}$$ decreases
C
$${E_c}$$ and $${E_v}$$ decrease, but $${E_g}$$ increases
D
All $${E_c},{E_g},{E_v}$$ decrease
2
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
The electrical conductivity of a semiconductor increases when electromagnetic radiation of wavelength shorter than $$2480$$ $$nm$$ is incident on it. The band gap in $$(eV)$$ for the semiconductor is
A
$$2.5$$ $$eV$$
B
$$1.1$$ $$eV$$
C
$$0.7$$ $$eV$$
D
$$0.5$$ $$eV$$
3
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
In a full wave rectifier circuit operating from $$50$$ $$Hz$$ mains frequency, the fundamental frequency in the ripple would be
A
$$25$$ $$Hz$$
B
$$50$$ $$Hz$$
C
$$70.7$$ $$Hz$$
D
$$100$$ $$Hz$$
4
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
In a common base amplifier, the phase difference between the input signal voltage and output voltage is
A
$$\pi $$
B
$${\pi \over 4}$$
C
$${\pi \over 2}$$
D
$$0$$
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