1
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
The length of the wire between two ends of a sonometer is 100 cm. What should be the positions of two bridges below the wire so that the three segments of the wire have their fundamental frequencies in the ratio 1 : 3 : 5.
A
$${{1500} \over {23}}cm,{{500} \over {23}}cm$$
B
$${{1500} \over {23}}cm,$$ $${{300} \over {23}}cm$$
C
$${{300} \over {23}}cm,{{1500} \over {23}}cm$$
D
$${{1500} \over {23}}cm,{{2000} \over {23}}cm$$
2
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Two sources P and Q produce notes of frequency 660 Hz. each. A listener moves from P to Q with a speed of 1 ms$$-$$1. If the speed of sound is 330 m/s, then the number of beats heard by the listener per second will be
A
4
B
8
C
2
D
zero
3
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
A charge q is placed at the centre of the line joining two equal charges Q. The system of the three charges will be in equilibrium if q is equal to
A
$$-$$Q/4
B
Q/4
C
$$-$$Q/2
D
Q/2
4
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
An electric dipole of dipole moment p is aligned parallel to a uniform electric field E. The energy required to rotate the dipole by 90o is
A
p2 E
B
pE
C
infinity
D
pE2
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