1
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
Three charges, each +q, are placed at the corners of an isosceles triangle ABC of sides BC and AC, 2$$a$$. D and E are the mid points of BC and CA. The work done in taking a charge Q from D to E is

AIPMT 2011 Mains Physics - Electrostatics Question 51 English
A
$${{3qQ} \over {4\pi {\varepsilon _0}a}}$$
B
$${{3qQ} \over {8\pi {\varepsilon _0}a}}$$
C
$${{qQ} \over {4\pi {\varepsilon _0}a}}$$
D
zero
2
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
The electric potential V at any point (x, y, z), all in metres in space is given by V = 4x2 volt. The electric field at the point (1, 0, 2) in volt/meter, is
A
8 along negative X-axis
B
8 along positive X-axis
C
16 along negative X-axis
D
16 along positive X-axis
3
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
Two identical piano wires, kept under the same tension T have a fundamental frequency of 600 Hz. The fractional increase in the tension of one of the wires which will lead to occurrence of 6 beats/s when both the wires oscillate together would be
A
0.01
B
0.02
C
0.03
D
0.04
4
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
Two particles are oscillating along two close parallel straight lines side by side, with the same frequency and amplitudes. They pass each other, moving in opposite directions when their displacement is half of the amplitude. The mean positions of the two particles lie on a straight line perpendicular to the paths of the two particles. The phase difference is
A
$${\pi \over 6}$$
B
0
C
$${{2\pi } \over 3}$$
D
$$\pi $$
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