1
WB JEE 2008
MCQ (Single Correct Answer)
+1
-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

A
0.075 N
B
1.5 $$\times$$ 10$$-$$2 N
C
0.225 N
D
2.25 $$\times$$ 10$$-$$2 N
2
WB JEE 2008
MCQ (Single Correct Answer)
+1
-0.25

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

A
increase
B
decrease
C
may increase or decrease
D
remain same
3
WB JEE 2024
MCQ (Single Correct Answer)
+1
-0.25

The elastic potential energy of a strained body is

A
stress $$\times$$ strain
B
stress / strain
C
stress $$\times$$ strain / volume
D
$$\frac{1}{2} \times$$ stress $$\times$$ strain $$\times$$ volume
4
WB JEE 2024
MCQ (Single Correct Answer)
+1
-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

A
$$t \propto \sqrt{n}$$
B
$$\mathrm{t} \propto \mathrm{n}$$
C
$$t\propto \sqrt{n+1}$$
D
$$t \propto \sqrt{n-1}$$
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