AIEEE 2005 | Properties of Matter Question 242 | Physics

A $$20$$ $$cm$$ long capillary tube is dipped in water. The water rises up to $$8$$ $$cm.$$ If the entire arrangement is put in a freely falling elevator the length of water column in the capillary tube will be

$$10$$ $$cm$$

$$8$$ $$cm$$

$$20$$ $$cm$$

$$4$$ $$cm$$

AIEEE 2004

MCQ (Single Correct Answer)

-1

A wire fixed at the upper end stretches by length $$l$$ by applying a force $$F.$$ The work done in stretching is

$$2Fl$$

$$Fl$$

$${F \over {2l}}$$

$${{Fl} \over 2}$$

AIEEE 2004

MCQ (Single Correct Answer)

-1

If two soap bubbles of different radii are connected by a tube

air flows from the smaller bubble to the bigger

air flows from bigger bubble to the smaller bubble till the sizes are interchanged

air flows from the bigger bubble to the smaller bubble till the sizes become equal

there is no flow of air.

AIEEE 2004

MCQ (Single Correct Answer)

-1

Spherical balls of radius $$R$$ are falling in a viscous fluid of viscosity $$\eta $$ with a velocity $$v.$$ The retarding viscous force acting on the spherical ball is

inversely proportional to both radius $$R$$ and velocity $$v$$

directly proportional to both radius $$R$$ and velocity $$v$$

directly proportional to $$R$$ but inversely proportional to $$v$$

inversely proportional to $$R,$$ but directly proportional to velocity $$v$$

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