1

JEE Main 2021 (Online) 24th February Evening Shift

Numerical

+4

-1

A series L-C-R circuit is designed to resonate at an angular frequency $$\omega$$

_{0}= 10^{5}rad/s. The circuit draws 16W power from 120V source at resonance. The value of resistance 'R' in the circuit is _________ $$\Omega$$.Your input ____

2

JEE Main 2021 (Online) 24th February Morning Shift

Numerical

+4

-1

A common transistor radio set requires 12 V (D.C.) for its operation. The D.C. source is constructed by using a transformer and a rectifier circuit, which are operated at 220 V (A.C.) on standard domestic A.C. supply. The number of turns of secondary coil are 24, then the number of turns of primary are ___________.

Your input ____

3

JEE Main 2021 (Online) 24th February Morning Shift

Numerical

+4

-1

Out of Syllabus

A resonance circuit having inductance and resistance 2 $$\times$$ 10

^{$$-$$4}H and 6.28$$\Omega$$ respectively oscillates at 10 MHz frequency. The value of quality factor of this resonator is ___________. [$$\pi$$ = 3.14]Your input ____

4

JEE Main 2020 (Online) 6th September Evening Slot

Numerical

+4

-0

In a series LR circuit, power of 400W is dissipated from a source of 250 V, 50 Hz. The power factor
of the circuit is 0.8. In order to bring the power factor to unity, a capacitor of value C is added in
series to the L and R. Taking the value of C as $$\left( {{n \over {3\pi }}} \right)$$ $$\mu $$F, then value of n is __________.

Your input ____

Questions Asked from Alternating Current (Numerical)

Number in Brackets after Paper Indicates No. of Questions

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