1
WB JEE 2020
MCQ (Single Correct Answer)
+1
-0.25
Change Language
A steel and a brass wire, each of length 50 cm and cross-sectional area 0.005 cm2 hang from a ceiling and are 15 cm apart. Lower ends of the wires are attached to a light horizontal bar. A suitable downward load is applied to the bar, so that each of the wires extends in length by 0.1 cm. At what distance from the steel wire, the load must be applied?

[Young's modulus of steel = 2 $$ \times $$ 1012 dyne/cm2 and that of brass = 1 $$ \times $$ 1012 dyne/cm2]
A
7.5 cm
B
5 cm
C
10 cm
D
3 cm
2
WB JEE 2020
MCQ (Single Correct Answer)
+1
-0.25
Change Language
Which of the following diagrams correctly shows the relation between the terminal velocity vT of a spherical body falling in a liquid and viscosity $$\eta $$ of the liquid?
A
WB JEE 2020 Physics - Properties of Matter Question 21 English Option 1
B
WB JEE 2020 Physics - Properties of Matter Question 21 English Option 2
C
WB JEE 2020 Physics - Properties of Matter Question 21 English Option 3
D
WB JEE 2020 Physics - Properties of Matter Question 21 English Option 4
3
WB JEE 2020
MCQ (Single Correct Answer)
+1
-0.25
Change Language
An ideal gas undergoes the cyclic process abca as shown in the given p - V diagram

WB JEE 2020 Physics - Heat and Thermodynamics Question 34 English
It rejects 50J of heat during ab and absorbs 80J of heat during ca. During bc, there is no transfer of heat and 40J of work is done by the gas. What should be the area of the closed curved abca?
A
30J
B
40J
C
10J
D
90J
4
WB JEE 2020
MCQ (Single Correct Answer)
+1
-0.25
Change Language
A container AB in the shape of a rectangular parallelopiped of length 5 m is divided internally by a movable partition P as shown in the figure.

WB JEE 2020 Physics - Heat and Thermodynamics Question 32 English
The left compartment is filled with a given mass of an ideal gas of molar mass 32 while the right compartment is filled with an equal mass of another ideal gas of molar mass 18 at same temperature. What will be the distance of P from the left wall A when equilibrium is established?
A
2.5 m
B
1.8 m
C
3.2 m
D
2.1 m
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