1
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
The electron in the hydrogen atom jumps from excited state (n = 3) to its ground state (n = 1) and the photons thus emitted irradiate a photosensitive material. If the work function of the material is 5.1 eV, the stopping potential is estimated to be (the energy of the electron in nth state En = $${{ - 13.6} \over {{n^2}}}eV$$)
A
5.1 V
B
12.1 V
C
17.2 V
D
7 V
2
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
The binding energy per nucleon in deuterium and helium nuclei are 1.1 MeV and 7.0 MeV, respectively. When two deuterium nuclei fuse to form a helium nucleus the energy released in the fusion is
A
23.6 MeV
B
2.2 MeV
C
28.0 MeV
D
30.2 MeV
3
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
The following figure shows a logic gate circuit with two inputs A and B and the output Y. The voltage waveforms of A, B and Y are as given.

AIPMT 2010 Mains Physics - Semiconductor Electronics Question 71 English

The logic gate is
A
NOR gate
B
OR gate
C
AND gate
D
NAND gate
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