1
JEE Main 2020 (Online) 8th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Boolean relation at the output stage-Y for the following circuit is : JEE Main 2020 (Online) 8th January Morning Slot Physics - Semiconductor Question 154 English
A
A.B
B
$$\overline A + \overline B $$
C
$$\overline A .\overline B $$
D
A + B
2
JEE Main 2020 (Online) 8th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Three charged particle A, B and C with charges –4q, 2q and –2q are present on the circumference of a circle of radius d. the charged particles A, C and centre O of the circle formed an equilateral triangle as shown in figure. Electric field at O along x-direction is : JEE Main 2020 (Online) 8th January Morning Slot Physics - Electrostatics Question 181 English
A
$${3{\sqrt 3 q} \over 4{\pi {\varepsilon _0}{d^2}}}$$
B
$${{\sqrt 3 q} \over 4{\pi {\varepsilon _0}{d^2}}}$$
C
$${{\sqrt 3 q} \over {\pi {\varepsilon _0}{d^2}}}$$
D
$${{2\sqrt 3 q} \over {\pi {\varepsilon _0}{d^2}}}$$
3
JEE Main 2020 (Online) 8th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The critical angle of a medium for a specific wavelength, if the medium has relative permittivity 3 and relative permeability $${4 \over 3}$$ for this wavelength, will be :
A
45°
B
15°
C
30°
D
60°
4
JEE Main 2020 (Online) 8th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
At time t = 0 magnetic field of 1000 Gauss is passing perpendicularly through the area defined by the closed loop shown in the figure. If the magnetic field reduces linearly to 500 Gauss, in the next 5s, then induced EMF in the loop is : JEE Main 2020 (Online) 8th January Morning Slot Physics - Electromagnetic Induction Question 90 English
A
48 μV
B
28 μV
C
56 μV
D
36 μV
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