1
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV. It can detect a signal of wavelength
A
4000 nm
B
6000 nm
C
4000 $$\mathop A\limits^ \circ $$
D
6000 $$\mathop A\limits^ \circ $$
2
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
Sodium has body centred packing. Distance between two nearest atoms is 3.7 $$\mathop A\limits^ \circ $$. The lattice parameter is
A
4.3 $$\mathop A\limits^ \circ $$
B
3.0 $$\mathop A\limits^ \circ $$
C
8.6 $$\mathop A\limits^ \circ $$
D
6.8 $$\mathop A\limits^ \circ $$
3
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
The figure shows elliptical orbit of a planet m about the sun S. The shaded area SCD is twice the shaded area SAB. If t1 is the time for the planet to move from C to D and t2 is the time to move from A to B then

AIPMT 2009 Physics - Gravitation Question 32 English
A
t1 = 4t2
B
t1 = 2t2
C
t1 = t2
D
t1 > t2
4
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
A bus is moving with a speed of 10 ms$$-$$1 on a straight road. A scooterist wishes to overtake the bus in 100 s. If the bus is at a distance of 1 km from the scooterist, with what speed should the scooterist chase the bus ?
A
40 m s$$-$$1
B
25 m s$$-$$1
C
10 m s$$-$$1
D
20 m s$$-$$1
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