JEE Main 2021 (Online) 27th August Evening Shift | Alternating Current and Electromagnetic Induction Question 91 | Physics

JEE Main 2021 (Online) 27th August Evening Shift

Numerical

-1

An ac circuit has an inductor and a resistor resistance R in series, such that X_L = 3R. Now, a capacitor is added in series such that X_C = 2R. The ratio of new power factor with the old power factor of the circuit is $$\sqrt 5 :x$$. The value of x is ___________.

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JEE Main 2021 (Online) 27th August Morning Shift

Numerical

-1

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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JEE Main 2021 (Online) 27th July Evening Shift

Numerical

-1

In the given figure the magnetic flux through the loop increases according to the relation $$\phi$$_B(t) = 10t² + 20t, where $$\phi$$_B is in milliwebers and t is in seconds.

The magnitude of current through R = 2$$\Omega$$ resistor at t = 5 s is ___________ mA.

JEE Main 2021 (Online) 27th July Evening Shift Physics - Alternating Current and Electromagnetic Induction Question 98 English

JEE Main 2021 (Online) 27th July Evening Shift Physics - Alternating Current and Electromagnetic Induction Question 98 English

Your input ____

JEE Main 2021 (Online) 27th July Morning Shift

Numerical

-1

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 and Electromagnetic Induction Question 99 English