WB JEE 2008 | Properties of Matter Question 3 | Physics

WB JEE 2008

MCQ (Single Correct Answer)

-0.25

A beaker of radius 15 cm is filled with a liquid of surface tension 0.075 N/m. Force across an imaginary diameter on the surface of the liquid is

0.075 N

1.5 $$\times$$ 10^$$-$$2 N

0.225 N

2.25 $$\times$$ 10^$$-$$2 N

WB JEE 2008

MCQ (Single Correct Answer)

-0.25

A piece of wood is floating in water. When the temperature of water rises, the apparent weight of the wood will

increase

decrease

may increase or decrease

remain same

WB JEE 2024

MCQ (Single Correct Answer)

-0.25

The elastic potential energy of a strained body is

stress $$\times$$ strain

stress / strain

stress $$\times$$ strain / volume

$$\frac{1}{2} \times$$ stress $$\times$$ strain $$\times$$ volume

WB JEE 2024

MCQ (Single Correct Answer)

-0.25

A body floats with $$\frac{1}{n}$$ of its volume keeping outside of water. If the body has been taken to height $$\mathrm{h}$$ inside water and released, it will come to the surface after time t. Then

$$t \propto \sqrt{n}$$

$$\mathrm{t} \propto \mathrm{n}$$

$$t\propto \sqrt{n+1}$$

$$t \propto \sqrt{n-1}$$

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