The power factor of a good choke coil is:

(1) Nearly zero

(2) Exactly zero

(3) Nearly one

(4) Exactly one

Concept Questions :-

Different types of AC Circuits
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

L, C and R represent physical quantities inductance, capacitance and resistance respectively. The combination representing dimension of frequency is

(1) LC

(2) (LC)–1/2

(3) ${\left(\frac{L}{C}\right)}^{-1/2}$

(4) $\frac{C}{L}$

Concept Questions :-

LC oscillations
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

In an ac circuit, a resistance of R ohm is connected in series with an inductance L. If phase angle between voltage and current be 45°, the value of inductive reactance will be

(1) $\frac{R}{4}$

(2) $\frac{R}{2}$

(3) R

(4) Cannot be found with the given data

Concept Questions :-

Different types of AC Circuits
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The phase difference between the current and voltage of LCR circuit in series combination at resonance is

(1) 0

(2) π/2

(3) π

(4) –π

Concept Questions :-

LC oscillations
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

In a series resonant circuit, the ac voltage across resistance R, inductance L and capacitance C are 5 V, 10 V and 10 V respectively. The ac voltage applied to the circuit will be

(1) 20 V

(2) 10 V

(3) 5 V

(4) 25 V

Concept Questions :-

LC oscillations
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

In a series LCR circuit, resistance R = 10Ω and the impedance Z = 20Ω. The phase difference between the current and the voltage is

(1) 30°

(2) 45°

(3) 60°

(4) 90°

Concept Questions :-

Different types of AC Circuits
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

In the circuit shown below, the ac source has voltage $V=20\mathrm{cos}\left(\omega t\right)$ volts with ω = 2000 rad/sec. the amplitude of the current will be nearest to

(1) 2A

(2) 3.3 A

(3) $2/\sqrt{5}A$

(4) $\sqrt{5}A$

Concept Questions :-

Different types of AC Circuits
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

In an ac circuit the reactance of a coil is $\sqrt{3}$ times its resistance, the phase difference between the voltage across the coil to the current through the coil will be

(1) π/3

(2) π/2

(3) π/4

(4) π/6

Concept Questions :-

Different types of AC Circuits
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The capacity of a pure capacitor is 1 farad. In dc circuits, its effective resistance will be

(1) Zero

(2) Infinite

(3) 1 ohm

(4) 1/2 ohm

Concept Questions :-

Different types of AC Circuits
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The power factor of an ac circuit having resistance (R) and inductance (L) connected in series and an angular velocity ω is

(1) $R/\omega L$

(2) $R/{\left({R}^{2}+{\omega }^{2}{L}^{2}\right)}^{1/2}$

(3) $\omega L/R$

(4) $R/{\left({R}^{2}-{\omega }^{2}{L}^{2}\right)}^{1/2}$

Concept Questions :-

Different types of AC Circuits