AIPMT 2015 | Properties of Matter Question 40 | Physics

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 40^oC in its temperature, is

0.025

0.010

0.015

0.020

AIPMT 2015

MCQ (Single Correct Answer)

-1

The Young's modulus of steel is twice that of brass. Two wires of same length and of same area of cross section, one of steel and another of brass are suspended from the same roof. If we want the lower ends of the wires to be at the same level, then the weights added to the steel and brass wires must be in the ratio of

4 : 1

1 : 1

1 : 2

2 : 1

AIPMT 2015

MCQ (Single Correct Answer)

-1

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

water rises upto a point a little below the top and stays there.

water does not rise at all.

water rises upto the tip of capillary tube and then starts overflowing like a fountain.

water rises upto the top of capillary tube and stays there without overflowing.

AIPMT 2015

MCQ (Single Correct Answer)

-1

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

$${{VR{}^2} \over {{n^3}{r^2}}}$$

$${{{V^2}R} \over {nr}}$$

$${{V{R^2}} \over {{n^2}{r^2}}}$$

$${{V{R^2}} \over {n{r^2}}}$$

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