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 2007
MCQ (Single Correct Answer)
+4
-1
If in a $$p$$-$$n$$ junction diode, a square input signal of $$10$$ $$V$$ is applied as shown AIEEE 2007 Physics - Semiconductor Question 179 English

Then the output signal across $${R_L}$$ will be

A
AIEEE 2007 Physics - Semiconductor Question 179 English Option 1
B
AIEEE 2007 Physics - Semiconductor Question 179 English Option 2
C
AIEEE 2007 Physics - Semiconductor Question 179 English Option 3
D
AIEEE 2007 Physics - Semiconductor Question 179 English Option 4
3
AIEEE 2006
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
In a common base mode of a transistor, the collector current is $$5.488$$ $$mA$$ for an emitter current of $$5.60mA.$$ The value of the base current amplification factor $$\left( \beta \right)$$ will be
A
$$49$$
B
$$50$$
C
$$51$$
D
$$48$$
4
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 180 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
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