1
NEET 2013
MCQ (Single Correct Answer)
+4
-1
A wave travelling in the + ve x-direction having displacement along y-direction as 1 m, wavelength 2$$\pi $$ m and frequency of $${1 \over \pi }$$ Hz is represented by
A
y = sin(10$$\pi $$x $$-$$ 20$$\pi $$t)
B
y = sin(2$$\pi $$x + 2$$\pi $$t)
C
y = sin(x $$-$$ 2t)
D
y $$=$$ sin(2$$\pi $$x $$-$$ 2$$\pi $$t)
2
NEET 2013
MCQ (Single Correct Answer)
+4
-1
A source of unknown frequency gives 4 beats/s when sounded with a source of known frquency 250 Hz. The second harmonic of the source of unknown frequency gives five beats per second, when sounded with a source of frequency 513 Hz. The unknown frequency is
A
240 Hz
B
260 Hz
C
254 Hz
D
246 Hz
3
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Two pith balls carrying equal charges are suspended from a common point by strings of equal length, the equilibrium separation between them is r. Now the strings are rigidly clamped at half the height. The equilibrium separation between the balls now become

NEET 2013 Physics - Electrostatics Question 58 English
A
$$\left( {{{2r} \over {\sqrt 3 }}} \right)$$
B
$$\left( {{{2r} \over 3}} \right)$$
C
$${\left( {{1 \over {\sqrt 2 }}} \right)^2}$$
D
$$\left( {{r \over {\root 3 \of 2 }}} \right)$$
4
NEET 2013
MCQ (Single Correct Answer)
+4
-1
A, B and C are three points in a uniform electric field. The electric potential is

NEET 2013 Physics - Electrostatics Question 59 English
A
maximum at C
B
same at all the three points A, B and C
C
maximum at A
D
maximum at B
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