1
JEE Main 2019 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Following figure shows two processes A and B for a gas. If $$\Delta $$QA and $$\Delta $$QB are the amount of heat absorbed by the system in two cases, and $$\Delta $$UA and $$\Delta $$UB are changes in internal energies, respectively, then : JEE Main 2019 (Online) 9th April Morning Slot Physics - Heat and Thermodynamics Question 265 English
A
$$\Delta $$QA > $$\Delta $$QB ; $$\Delta $$UA > $$\Delta $$UB
B
$$\Delta $$QA < $$\Delta $$QB ; $$\Delta $$UA < $$\Delta $$UB
C
$$\Delta $$QA > $$\Delta $$QB ; $$\Delta $$UA = $$\Delta $$UB
D
$$\Delta $$QA = $$\Delta $$QB ; $$\Delta $$UA = $$\Delta $$UB
2
JEE Main 2019 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The total number of turns and cross-section area in a solenoid is fixed. However, its length L is varied by adjusting the separation between windings. The inductance of solenoid will be proportional to :
A
1/L2
B
1/L
C
L
D
L2
3
JEE Main 2019 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A simple pendulum oscillating in air has period T. The bob of the pendulum is completely immersed in a non-viscous liquid. The density of the liquid is 1/16 th of the material of the bob. If the bob is inside liquid all the time, its period of oscillation in this liquid is :
A
$$2T\sqrt {{1 \over {10}}} $$
B
$$4T\sqrt {{1 \over {14}}} $$
C
$$4T\sqrt {{1 \over {15}}} $$
D
$$2T\sqrt {{1 \over {14}}} $$
4
JEE Main 2019 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A body of mass 2 kg makes an eleastic collision with a second body at rest and continues to move in the original direction but with one fourth of its original speed. What is the mass of the second body ?
A
1.2 kg
B
1.0 kg
C
1.8 kg
D
1.5 kg
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