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1
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
Carbon, silicon and germanium have four valence electrons each. At room temperature which one of the following statements is most appropriate ?
A
The number of free electrons for conduction is significant only in $$Si$$ and $$Ge$$ but small in $$C.$$
B
The number of free conduction electrons is significant in $$C$$ but small in $$Si$$ and $$Ge.$$
C
The number of free conduction electrons is negligibly small in all the three.
D
The number of free electrons for conduction is significant in all the three
2
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 219 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
3
AIEEE 2006
MCQ (Single Correct Answer)
+4
-1
In the following, which one of the diodes is reverse biased?
A
AIEEE 2006 Physics - Semiconductor Question 220 English Option 1
B
AIEEE 2006 Physics - Semiconductor Question 220 English Option 2
C
AIEEE 2006 Physics - Semiconductor Question 220 English Option 3
D
AIEEE 2006 Physics - Semiconductor Question 220 English Option 4
4
AIEEE 2006
MCQ (Single Correct Answer)
+4
-1
The circuit has two oppositively connected ideal diodes in parallel. What is the current following in the circuit?

AIEEE 2006 Physics - Semiconductor Question 221 English
A
$$1.71$$ $$A$$
B
$$2.00$$ $$A$$
C
$$2.31$$ $$A$$
D
$$1.33$$ $$A$$
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