MHT CET 2023 10th May Morning Shift | Alternating Current Question 30 | Physics

The inductive reactance of a coil is '$$\mathrm{X}_{\mathrm{L}}$$'. If the inductance of a coil is tripled and frequency of a.c. supply is doubled, then the new inductive reactance will be

$$\frac{2}{3} X_L$$

$$\frac{3}{2} X_L$$

$$\frac{1}{6} X_L$$

$$6 \mathrm{X}_{\mathrm{L}}$$

MHT CET 2023 10th May Morning Shift

MCQ (Single Correct Answer)

-0

In the circuit shown the ratio of quality factor and the bandwidth is

MHT CET 2023 10th May Morning Shift Physics - Alternating Current Question 40 English

10 s

8 s

6 s

4 s

MHT CET 2023 10th May Morning Shift

MCQ (Single Correct Answer)

-0

In a series LR circuit, $$X_L=R$$, power factor is $$P_1$$. If a capacitor of capacitance $$C$$ with $$X_C=X_L$$ is added to the circuit the power factor becomes $$P_2$$. The ratio of $$P_1$$ to $$P_2$$ will be

$$1: 3$$

$$1: \sqrt{2}$$

$$1: 1$$

$$1: 2$$

MHT CET 2023 9th May Evening Shift

MCQ (Single Correct Answer)

-0

An e.m.f. $$E=4 \cos (1000 t)$$ volt is applied to an LR circuit of inductance $$3 \mathrm{~mH}$$ and resistance $$4 ~\Omega$$. The maximum current in the circuit is

$$\frac{4}{\sqrt{7}} \mathrm{~A}$$

$$1.0 \mathrm{~A}$$

$$\frac{4}{7} \mathrm{~A}$$

$$0.8 \mathrm{~A}$$

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