Electricity
Current Electricity
MCQ (Single Correct Answer)
Moving Charges and Magnetism
MCQ (Single Correct Answer)
Magnetism and Matter
MCQ (Single Correct Answer)
Electromagnetic Induction
MCQ (Single Correct Answer)
Electromagnetic Waves
MCQ (Single Correct Answer)
Modern Physics
Semiconductor Electronics
MCQ (Single Correct Answer)
1
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
The symbolic representation of four logic gates are given below

AIPMT 2009 Physics - Semiconductor Electronics Question 70 English

The logic symbols for OR, NOT and NAND gates are respectively
A
(iv), (i), (iii)
B
(iv), (ii), (i)
C
(i), (iii), (iv)
D
(iii), (iv), (ii)
2
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
If the lattice parameter for a crystalline structure is 3.6 $$\mathop A\limits^ \circ $$, then the atomic radius in fcc crystal is
A
2.92 $$\mathop A\limits^ \circ $$
B
1.27 $$\mathop A\limits^ \circ $$
C
1.81 $$\mathop A\limits^ \circ $$
D
2.10 $$\mathop A\limits^ \circ $$
3
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The voltage gain of an amplifier with 9% negative feedback is 10. The voltage gain without feedback will be
A
1.25
B
100
C
90
D
10
4
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
A p-n photodiode is made of a material with a band gap of 2.0 eV. The minimum frequency of the radiation that can be absorbed by the material is nearly
A
1 $$ \times $$ 1014 Hz
B
20 $$ \times $$ 1014 Hz
C
10 $$ \times $$ 1014 Hz
D
5 $$ \times $$ 1014 Hz
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