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
If $$\Delta $$U and $$\Delta $$W represent the increase in internal energy and work done by the system respectively in a thermodynamical process, which of the following is true ?
A
$$\Delta $$U = $$-$$$$\Delta $$W, in an adiabtic process
B
$$\Delta $$U = $$\Delta $$W, in an isothermal process
C
$$\Delta $$U = $$\Delta $$W, in an adiabatic process
D
$$\Delta $$U = $$-$$ $$\Delta $$W, in an isothermal process
3
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 $$\omega /2\pi $$
4
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
The period of oscillation of a mass M suspended from a strong of negligible mass is T. If along with it another mass M is also suspended, the period of oscillation will now be
A
T
B
$${T \over {\sqrt 2 }}$$
C
2T
D
$$\sqrt 2 T$$
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