1
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
The earth is assumed to be a sphere of radius R. A platform is arranged at a height R from the surface of the earth. The escape velocity of a body from this platform is fv, where v is its escape velocity from the surface of the Earth. The value of f is
A
1/2
B
$$\sqrt 2 $$
C
1/$$\sqrt 2 $$
D
1/3
2
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
A black body at 1227oC emits radiations with maximum intensity at a wavelength of 5000 $$\mathop A\limits^ \circ $$. If the temperature of the body is increased by 1000oC, the maximum intensity will be observed at
A
3000 $$\mathop A\limits^ \circ $$
B
4000$$\mathop A\limits^ \circ $$
C
5000$$\mathop A\limits^ \circ $$
D
6000$$\mathop A\limits^ \circ $$
3
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Which one of the following statements is true ?
A
both light and sound waves can travel in vaccum
B
both light and sound waves in air are transverse
C
The second waves in air are longitudinal while the light waves are transverse
D
both light and sound waves in air are
4
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
A rectangular block of mass m and area of cross-section A floats in a liquid of density $$\rho $$. If it is given a small vertical displacement from equilibrium it undergoes with a time period T, then
A
$$T \propto {1 \over {\sqrt m }}$$
B
$$T \propto \sqrt \rho $$
C
$$T \propto {1 \over {\sqrt A }}$$
D
$$T \propto {1 \over \rho }$$