1
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.
2
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
A nucleus $${}_Z^AX$$ has mass represented by M(A, Z). If Mp and Mn denote the mass of proton and neutron respectively and B.E. the binding energy in MeV, then
A
B.E. = [ZMp + (A $$-$$ Z)Mn $$-$$ M(A, Z)]c2
B
B.E. = [ZMp + AMp $$-$$ M(A, Z)]c2
C
B.E. = M(A, Z) $$-$$ ZMp $$-$$ (A $$-$$ Z)Mn
D
B.E. = [M(A, Z) $$-$$ ZMp $$-$$ (A $$-$$ Z)Mn]c2
3
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
$$\matrix{ A & B & Y \cr 0 & 0 & 0 \cr 0 & 1 & 0 \cr 1 & 0 & 0 \cr 1 & 1 & 1 \cr } $$
4
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
Two satellites of earth, S1 and S2 are moving in the same orbit. The mass of S1 is four times the mass of S2. Which one of the following statements is true ?
A
The potential energies of earth and satellite in the two cases are equal.
B
S1 and S2 are moving with the same speed.
C
The kinetic energies of the two satellites are equal.
D
The time period of S1 is four times that of S2.