AIEEE 2006 | Properties of Matter Question 255 | Physics

A wire elongates by $$l$$ $$mm$$ when a LOAD $$W$$ is hanged from it. If the wire goes over a pulley and two weights $$W$$ each are hung at the two ends, the elongation of the wire will be (in $$mm$$)

$$l$$

$$2l$$

zero

$$l/2$$

AIEEE 2005

MCQ (Single Correct Answer)

-1

If $$S$$ is stress and $$Y$$ is young's modulus of material of a wire, the energy stored in the wire per unit volume is

$${{{S^2}} \over {2Y}}$$

$$2{S^2}Y$$

$${S \over {2Y}}$$

$${{2Y} \over {{S^2}}}$$

AIEEE 2005

MCQ (Single Correct Answer)

-1

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

$$2Fl$$

$$Fl$$

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

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