1
JEE Main 2020 (Online) 6th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Four point masses, each of mass m, are fixed at the corners of a square of side $$l$$. The square is rotating with angular frequency $$\omega $$, about an axis passing through one of the corners of the square and parallel to its diagonal, as shown in the figure. The angular momentum of the square about this axis is : JEE Main 2020 (Online) 6th September Morning Slot Physics - Rotational Motion Question 98 English
A
3m$$l$$2$$\omega $$
B
4m$$l$$2$$\omega $$
C
m$$l$$2$$\omega $$
D
2m$$l$$2$$\omega $$
2
JEE Main 2020 (Online) 6th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
For the given input voltage waveform Vin(t), the output voltage waveform V0(t), across the capacitor is correctly depicted by : JEE Main 2020 (Online) 6th September Morning Slot Physics - Capacitor Question 77 English
A
JEE Main 2020 (Online) 6th September Morning Slot Physics - Capacitor Question 77 English Option 1
B
JEE Main 2020 (Online) 6th September Morning Slot Physics - Capacitor Question 77 English Option 2
C
JEE Main 2020 (Online) 6th September Morning Slot Physics - Capacitor Question 77 English Option 3
D
JEE Main 2020 (Online) 6th September Morning Slot Physics - Capacitor Question 77 English Option 4
3
JEE Main 2020 (Online) 6th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A satellite is in an elliptical orbit around a planet P. It is observed that the velocity of the satellite when it is farthest from the planet is 6 times less than that when it is closest to the planet. The ratio of distances between the satellite and the planet at closest and farthest points is:
A
1 : 2
B
1 : 3
C
1 : 6
D
3 : 4
4
JEE Main 2020 (Online) 6th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
If the potential energy between two molecules is given by
U = $$ - {A \over {{r^6}}} + {B \over {{r^{12}}}}$$,
then at equilibrium, separation between molecules, and the potential energy are :
A
$${\left( {{{2B} \over A}} \right)^{1/6}}$$, $$ - {{{A^2}} \over {4B}}$$
B
$${\left( {{{2B} \over A}} \right)^{1/6}}, - {{{A^2}} \over {2B}}$$
C
$${\left( {{B \over A}} \right)^{1/6}},0$$
D
$${\left( {{B \over {2A}}} \right)^{1/6}}, - {{{A^2}} \over {2B}}$$
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