MHT CET 2021 23rd September Evening Shift | Alternating Current Question 106 | Physics

A series L-C-R circuit containing a resistance of $$120 ~\Omega$$ has angular frequency $$4 \times 10^5 \mathrm{~rad} \mathrm{~s}^{-1}$$. At resonance the voltage across resistance and inductor are $$60 \mathrm{~V}$$ and $$40 \mathrm{~V}$$ respectively, then the value of inductance will be

$$0.2 \mathrm{~mH}$$

$$0.4 \mathrm{~mH}$$

$$0.8 \mathrm{~mH}$$

$$0.6 \mathrm{~mH}$$

MHT CET 2021 23th September Morning Shift

MCQ (Single Correct Answer)

-0

For series LCR circuit, which one of the following is a CORRECT statement?

Potential difference across resistance $$\mathrm{R}$$ and that across capacitor have phase difference $$\frac{\pi^{\mathrm{c}}}{2}$$.

Applied e.m.f. and potential difference across resistance '$$R$$' are in the same phase

Applied e.m.f. and potential difference inductor coil has phase difference of $$\frac{\pi^{\mathrm{c}}}{2}$$

Potential difference across capacitor and that across inductor have phase difference of $$\frac{\pi^{\mathrm{c}}}{2}$$.

MHT CET 2021 23th September Morning Shift

MCQ (Single Correct Answer)

-0

In an LCR series a.c. circuit, the voltage across each of the components L, C and R is 60 V. The voltage across the LC combination is

120 V

60 V

zero V

$$\frac{60}{\sqrt{3}}$$ V

MHT CET 2021 23th September Morning Shift

MCQ (Single Correct Answer)

-0

If we increase the frequency of an a.c. supply, then inductive reactance

increases directly with the square of frequency

increases as it directly proportional to frequency

decreases inversely with the square of frequency

decreases as it is inversely proportional to the frequency

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