1
WB JEE 2018
MCQ (Single Correct Answer)
+1
-0.25
Change Language
The stress along the length of a rod (with rectangular cross-section) is 1% of the Young's modulus of its material. What is the approximate percentage of change of its volume? (Poisson's ratio of the material of the rod is 0.3).
A
3%
B
1%
C
0.7%
D
0.4%
2
WB JEE 2018
MCQ (Single Correct Answer)
+1
-0.25
Change Language
What will be the approximate terminal velocity of a rain drop of diameter $${1.8 \times {{10}^{ - 3}}}$$ m, when density of rain water $$ \approx $$ $${1.8 \times {{10}^{ - 5}}}$$ N-sm$$-$$2 (Neglect buoyancy of air)
A
49 ms$$-$$1
B
98ms$$-$$1
C
392 ms$$-$$1
D
980 ms$$-$$1
3
WB JEE 2018
MCQ (Single Correct Answer)
+1
-0.25
Change Language
The water equivalent of a calorimeter is 10 g and it contains 50 g of water at 15$$^\circ$$C. Some amount of ice, initially at $$-$$ 10$$^\circ$$C is dropped in it and half of the ice melts till equilibrium is reached. What was the initial amount of ice that was dropped (when specific heat of ice = 0.5 cal gm$$-$$1 $$^\circ$$C$$-$$1, specific heat of water = 10 cal gm$$-$$1 $$^\circ$$C$$-$$1 and latent heat of melting of ice = 80 cal gm$$-$$1) ?
A
10 g
B
18 g
C
20 g
D
30 g
4
WB JEE 2018
MCQ (Single Correct Answer)
+1
-0.25
Change Language
One mole of a monoatomic ideal gas undergoes a quasistatic process, which is depicted by a straight line joining points $$({V_0},{T_0})$$ and $$({2V_0},{3T_0})$$ in a V-T diagram. What is the value of the heat capacity of the gas at the point $$({V_0},{T_0})$$?
A
R
B
$${3 \over 2}R$$
C
2R
D
0
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