1
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
An automobile moves on a road with a speed of 54 km h$$-$$1. The radius of its wheels is 0.45 m and the moment of inertia of the wheel about its axis of rotation is 3 kg m2. If the vehicle is brought to rest in 15 s, the magnitude of average torque transmitted by its brakes to the wheel is
A
10.86 kg m2 s$$-$$2
B
2.86 kg m2 s$$-$$2
C
6.66 kg m2 s$$-$$2
D
8.58 kg m2 s$$-$$2
2
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
Water rises to a height h in capillary tube. If the length of capillary tube above the surface of water is made less than h, then
A
water rises upto a point a little below the top and stays there.
B
water does not rise at all.
C
water rises upto the tip of capillary tube and then starts overflowing like a fountain.
D
water rises upto the top of capillary tube and stays there without overflowing.
3
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
The value of coefficient of volume expansion of glycerin is 5 $$ \times $$ 10$$-$$4 K$$-$$1. The fractional change in the density of glycerin for a rise of 40oC in its temperature, is
A
0.025
B
0.010
C
0.015
D
0.020
4
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
The cylindrical tube of a spray pump has radius R, one end of which has n fine holes, each of radius r. If the speed of the liquid in the tube is V, the speed of the ejection of the liquid through the holes is
A
$${{VR{}^2} \over {{n^3}{r^2}}}$$
B
$${{{V^2}R} \over {nr}}$$
C
$${{V{R^2}} \over {{n^2}{r^2}}}$$
D
$${{V{R^2}} \over {n{r^2}}}$$