1
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
Two waves having equation x1 = $$a$$sin($$\omega $$t $$-$$ kx + $$\phi $$1), x2 = asin($$\omega $$t $$-$$kx + $$\phi $$2). If in the resultant wave the frequency and amplitude remain equal to amplitude of superimposing waves, the phase difference between them is
A
$${\pi \over 6}$$
B
$${{2\pi } \over 3}$$
C
$${\pi \over 4}$$
D
$${\pi \over 3}$$
2
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
The equation of a wave is represented by

y $$=$$ 10$$-$$4 sin(100t $$-$$ $${x \over {10}}$$) m. then the velocity of wave will be
A
100 m/s
B
4 m/s
C
1000 m/s
D
10 m/s
3
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
Energy per unit volume for a capacitor having area A and separation d kept at potential difference V is given by
A
$${1 \over 2}{\varepsilon _0}{{{V^2}} \over {{d^2}}}$$
B
$${1 \over {2{\varepsilon _0}}}{{{V^2}} \over {{d^2}}}$$
C
$${1 \over 2}C{V^2}$$
D
$${{{Q^2}} \over {2C}}.$$
4
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
A dipole of dipole moment $$\overrightarrow p $$ is placed in uniform electric field $$\overrightarrow E $$ then torque acting on it is given by
A
$$\overrightarrow \tau = \overrightarrow p .\overrightarrow E $$
B
$$\overrightarrow \tau = \overrightarrow p \times \overrightarrow E $$
C
$$\overrightarrow \tau = \overrightarrow p + \overrightarrow E $$
D
$$\overrightarrow \tau = \overrightarrow p - \overrightarrow E $$