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 July Morning Shift
Numerical
+4
-1
Change Language
Consider an electrical circuit containing a two way switch 'S'. Initially S is open and then T1 is connected to T2. As the current in R = 6$$\Omega$$ attains a maximum value of steady state level, T1 is disconnected from T2 and immediately connected to T3. Potential drop across r = 3$$\Omega$$ resistor immediately after T1 is connected to T3 is __________ V. (Round off to the Nearest Integer)

JEE Main 2021 (Online) 27th July Morning Shift Physics - Alternating Current Question 102 English
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3
JEE Main 2021 (Online) 25th July Evening Shift
Numerical
+4
-1
Change Language
Two circuits are shown in the figure (a) & (b). At a frequency of ____________ rad/s the average power dissipated in one cycle will be same in both the circuits.

JEE Main 2021 (Online) 25th July Evening Shift Physics - Alternating Current Question 105 English
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4
JEE Main 2021 (Online) 25th July Morning Shift
Numerical
+4
-1
Change Language
An inductor of 10 mH is connected to a 20V battery through a resistor of 10 k$$\Omega$$ and a switch. After a long time, when maximum current is set up in the circuit, the current is switched off. The current in the circuit after 1 $$\mu$$s is $${x \over {100}}$$ mA. Then x is equal to ___________. (Take e$$-$$1 = 0.37)
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