NEET 2016 Phase 1 | Properties of Matter Question 41 | Physics

NEET 2016 Phase 1

MCQ (Single Correct Answer)

-1

Coefficient of linear expansion of brass and steel rods are $$\alpha $$₁ and $$\alpha $$₂. Lengths of brass and steel rods are $$l$$₁ and $$l$$₂ respectively. If ($$l$$₁ $$-$$ $$l$$₂) is maintained same at all temperatures, which one of the following relations holds good?

$$\alpha $$₁$$l$$₂ = $$\alpha $$₂ ²$$l$$₁

$$\alpha $$₁$$l$$₁ = $$\alpha $$₂l₂

$$\alpha $$₁$$l$$₂ = $$\alpha $$₂$$l$$₁

$$\alpha $$₁$$l$$₂² = $$\alpha $$₂$$l$$₁²

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

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

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

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

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

AIPMT 2015

MCQ (Single Correct Answer)

-1

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

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