1
MHT CET 2021 23rd September Evening Shift
MCQ (Single Correct Answer)
+1
-0

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

A
$$0.2 \mathrm{~mH}$$
B
$$0.4 \mathrm{~mH}$$
C
$$0.8 \mathrm{~mH}$$
D
$$0.6 \mathrm{~mH}$$
2
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

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

A
Potential difference across resistance $$\mathrm{R}$$ and that across capacitor have phase difference $$\frac{\pi^{\mathrm{c}}}{2}$$.
B
Applied e.m.f. and potential difference across resistance '$$R$$' are in the same phase
C
Applied e.m.f. and potential difference inductor coil has phase difference of $$\frac{\pi^{\mathrm{c}}}{2}$$
D
Potential difference across capacitor and that across inductor have phase difference of $$\frac{\pi^{\mathrm{c}}}{2}$$.
3
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-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

A
120 V
B
60 V
C
zero V
D
$$\frac{60}{\sqrt{3}}$$ V
4
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

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

A
increases directly with the square of frequency
B
increases as it directly proportional to frequency
C
decreases inversely with the square of frequency
D
decreases as it is inversely proportional to the frequency
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