1
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
The frequency of a light wave in a material is 2 $$ \times $$ 1014 Hz and wavelength is 5000 $$\mathop A\limits^ \circ $$. The refractive index of material will be
A
1.50
B
3.00
C
1.33
D
1.40
2
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
In the energy band diagram of a material shown below, the open circles and filled circles denote holes and electrons respectively. The material is

AIPMT 2007 Physics - Semiconductor Electronics Question 65 English
A
an insulator
B
a metal
C
an n-type semiconductor
D
a p-type semiconductor.
3
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
The total energy of electron in the ground state of hydrogen atom is $$-$$ 13.6 eV. The kinetic energy of an electron in the first excited state is
A
6.8 eV
B
13.6 eV
C
1.7 eV
D
3.4 eV.
4
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
In the following circuit, the output Y for all possible inputs A and B is expressed by the truth table.

AIPMT 2007 Physics - Semiconductor Electronics Question 67 English
A
$$\matrix{ A & B & Y \cr 0 & 0 & 1 \cr 0 & 1 & 1 \cr 1 & 0 & 1 \cr 1 & 1 & 0 \cr } $$
B
$$\matrix{ A & B & Y \cr 0 & 0 & 1 \cr 0 & 1 & 0 \cr 1 & 0 & 0 \cr 1 & 1 & 0 \cr } $$
C
$$\matrix{ A & B & Y \cr 0 & 0 & 0 \cr 0 & 1 & 1 \cr 1 & 0 & 1 \cr 1 & 1 & 1 \cr } $$
D
$$\matrix{ A & B & Y \cr 0 & 0 & 0 \cr 0 & 1 & 0 \cr 1 & 0 & 0 \cr 1 & 1 & 1 \cr } $$