1
JEE Main 2021 (Online) 27th August Morning Shift
Numerical
+4
-1
Change Language
The alternating current is given by $$i = \left\{ {\sqrt {42} \sin \left( {{{2\pi } \over T}t} \right) + 10} \right\}A$$

The r.m.s. value of of this current is ................. A.
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2
JEE Main 2021 (Online) 27th August Morning Shift
Numerical
+4
-1
Change Language
A uniform conducting wire of length is 24a, and resistance R is wound up as a current carrying coil in the shape of an equilateral triangle of side 'a' and then in the form of a square of side 'a'. The coil is connected to a voltage source V0. The ratio of magnetic moment of the coils in case of equilateral triangle to that for square is 1 : $$\sqrt y $$ where y is ................. .
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3
JEE Main 2021 (Online) 27th August Morning Shift
Numerical
+4
-1
Out of Syllabus
Change Language
A circuit is arranged as shown in figure. The output voltage V0 is equal to ................... V.

JEE Main 2021 (Online) 27th August Morning Shift Physics - Semiconductor Question 75 English
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4
JEE Main 2021 (Online) 27th August Morning Shift
Numerical
+4
-1
Change Language
First, a set of n equal resistors of 10 $$\Omega$$ each are connected in series to a battery of emf 20V and internal resistance 10$$\Omega$$. A current I is observed to flow. Then, the n resistors are connected in parallel to the same battery. It is observed that the current is increased 20 times, then the value of n is ............... .
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