1
JEE Main 2019 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Four identical particles of mass M are located at the corners of a square of side 'a'. What should be their speed if each of them revolves under the influence of other's gravitational field in a circular orbit circumscribing the square? JEE Main 2019 (Online) 8th April Morning Slot Physics - Gravitation Question 134 English
A
$$1.21\sqrt {{{GM} \over a}} $$
B
$$1.16\sqrt {{{GM} \over a}} $$
C
$$1.41\sqrt {{{GM} \over a}} $$
D
$$1.35\sqrt {{{GM} \over a}} $$
2
JEE Main 2019 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A plane electromagnetic wave travels in free space along the x-direction. The electric field component of the wave at a particular point of space and time is E = 6 V m–1 along y-direction. Its corresponding magnetic field component, B would be :
A
2 × 10–8 T along y-direction
B
6 × 10–8 T along z-direction
C
2 × 10–8 T along z-direction
D
6 × 10–8 T along x-direction
3
JEE Main 2019 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A particle moves in one dimension from rest under the influence of a force that varies with the distance travelled by the particle as shown in the figure. The kinetic energy of the particle after it has travelled 3m is : JEE Main 2019 (Online) 8th April Morning Slot Physics - Work Power & Energy Question 78 English
A
6.5 J
B
2.5 J
C
5 J
D
4 J
4
JEE Main 2019 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
In SI units, the dimesions of $$\sqrt {{{{ \in _0}} \over {{\mu _0}}}} $$ is :
A
A–1 TML3
B
A2T3M–1L–2
C
AT–3ML3/2
D
AT2M–1L–1
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