1
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
Assuming the sun to have a spherical outer surface of radius r, radiating like a black body at temperature toC, the power received by a unit surface, (normal to the incident rays) at a distance R from the centre of the sun is
where $$\sigma $$ is the Stefan's constant.
A
$${{{r^2}\sigma {{\left( {t + 273} \right)}^4}} \over {4\pi {R^2}}}$$
B
$${{16{\pi ^2}{r^2}\sigma {t^4}} \over {{R^2}}}$$
C
$${{{r^2}\sigma {{\left( {t + 273} \right)}^4}} \over {{R^2}}}$$
D
$${{4\pi {r^2}\sigma {t^4}} \over {{R^2}}}$$
2
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
The displacement of a particle along the x-axis is given by x = asin2$$\omega $$t. The motion of the particle corresponds to
A
simple harmonic motion of frequency $$\omega $$/$$\pi $$
B
simple harmonic motion of frequency $$3\omega /2\pi $$
C
non simple harmonic motion
D
simple harmonic motion of frequency $$\omega /2\pi $$
3
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
A transverse wave is represented by
y = Asin($$\omega $$t $$-$$ kx). For what value of the wavelength is the wave velocity equal to the maximum particle velocity ?
A
$$\pi A/2$$
B
$$\pi A$$
C
2$$\pi A$$
D
$$A$$
4
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
A tuning fork of frequency 512 Hz makes 4 beats per second with the vibrating string of a piano. The beat frequency decreases to 2 beats per sec when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was
A
510 Hz
B
514 Hz
C
516 Hz
D
508 Hz