AIPMT 2011 Solved Papers
AIPMT Examination
AIPMT Solved / Unsolved Papers
AIPMT Important Links
Physics 2011
Q. 46. A nucleus 
emits one a particle and two β-particles. The resulting nucleus is
Sol:
α emission decreases mass number by 4 and atomic number by 2. One β– emission increases atomic number by one but leaves mass number unchanged.
Answer : (4)
Q.47. A transistor is operated in common emitter configuration at VC = 2 V such that a change in the base current from 100 mA to 300 mA produces a change in the collector current from 10 mA to 20 mA. The current gain is
(1) 25 (2) 50
(3) 75 (4) 100
Sol:
Answer : (2)
Q.48. If a small amount of antimony is added to germanium crystal
(1) Its resistance is increased
(2) It becomes a p-type semiconductor
(3) The antimony becomes an acceptor atom
(4) There will be more free electrons than hole in the semiconductor
Sol:
Addition of antimony will make it an N-type semiconductor
Answer : (4)
Q.49. In forward biasing of the p-n junction
(1) The positive terminal of the battery in connected to p-side and the depletion region becomes thin
(2) The positive terminal of the battery is connected to p-side and the depletion region becomes thick
(3) The positive terminal of the battery is connected to n-side and the depletion region becomes thin
(4) The positive terminal of the battery is connected to n-side and the depletion region becomes thick
Sol:
Fact
Answer : (1)
Q.50. Symbolic representation of four logic gates are shown as
Pick out which ones are for AND, NAND and NOT gates, respectively :
(1) (ii), (iv) and (iii) (2) (ii), (iii) and (iv)
(3) (iii), (ii) and (i) (4) (iii), (ii) and (iv)
Sol:
Fact
Answer : (1)