1
JEE Main 2022 (Online) 28th June Evening Shift
+4
-1

Two objects of equal masses placed at certain distance from each other attracts each other with a force of F. If one-third mass of one object is transferred to the other object, then the new force will be :

A
$${2 \over 9}$$ F
B
$${16 \over 9}$$ F
C
$${8 \over 9}$$ F
D
F
2
JEE Main 2022 (Online) 28th June Evening Shift
+4
-1

A water drop of radius 1 $$\mu$$m falls in a situation where the effect of buoyant force is negligible. Co-efficient of viscosity of air is 1.8 $$\times$$ 10$$-$$5 Nsm$$-$$2 and its density is negligible as compared to that of water 106 gm$$-$$3. Terminal velocity of the water drop is :

(Take acceleration due to gravity = 10 ms$$-$$2)

A
145.4 $$\times$$ 10$$-$$6 ms$$-$$1
B
118.0 $$\times$$ 10$$-$$6 ms$$-$$1
C
132.6 $$\times$$ 10$$-$$6 ms$$-$$1
D
123.4 $$\times$$ 10$$-$$6 ms$$-$$1
3
JEE Main 2022 (Online) 28th June Evening Shift
+4
-1

A sample of an ideal gas is taken through the cyclic process ABCA as shown in figure. It absorbs, 40 J of heat during the part AB, no heat during BC and rejects 60 J of heat during CA. A work of 50 J is done on the gas during the part BC. The internal energy of the gas at A is 1560 J. The workdone by the gas during the part CA is :

A
20 J
B
30 J
C
$$-$$30 J
D
$$-$$60 J
4
JEE Main 2022 (Online) 28th June Evening Shift
+4
-1

What will be the effect on the root mean square velocity of oxygen molecules if the temperature is doubled and oxygen molecule dissociates into atomic oxygen?

A
The velocity of atomic oxygen remains same
B
The velocity of atomic oxygen doubles
C
The velocity of atomic oxygen becomes half
D
The velocity of atomic oxygen becomes four times
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Joint Entrance Examination