1
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
When 1 kg of ice at 0oC melts to water at 0oC, the resulting change in its entropy, taking latent heat of ice to be 80 cal/oC, is
A
273 cal/K
B
8 $$ \times $$ 104 cal/K
C
80 cal/K
D
293 cal/K
2
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
Sound waves travel at 350 m/s through a warm air and at 3500 m/s through brass. The wavelength of a 700 Hz acoustic wave as it enters brass from warm air
A
decrease by a factor 10
B
increase by a factor 20
C
increase by a factor 10
D
decrease by a factor 20
3
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
A current of 2 A flows through a 2 $$\Omega $$ resistor when connected across a battery a 2 $$\Omega $$ resistor when connected across a battery. The same battery supplies a current of 0.5 A when connected across a 9 $$\Omega $$ resistor. The internal resistance of the battery is
A
0.5 $$\Omega $$
B
1/3 $$\Omega $$
C
1/4 $$\Omega $$
D
1 $$\Omega $$
4
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
A parallel plate capacitor has a uniform electric field E in the space between the plates. If the distance between the plates is d and area of each plate is A, the energy stored in the capacitor is
A
$${1 \over 2}{\varepsilon _0}{E^2}$$
B
$${{{E^2}Ad} \over {{\varepsilon _0}}}$$
C
$${1 \over 2}{\varepsilon _0}{E^2}Ad$$
D
$${\varepsilon _0}EAd$$