1
MHT CET 2023 10th May Morning Shift
+1
-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

A
$$1: 3$$
B
$$1: \sqrt{2}$$
C
$$1: 1$$
D
$$1: 2$$
2
MHT CET 2023 9th May Evening Shift
+1
-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

A
$$\frac{4}{\sqrt{7}} \mathrm{~A}$$
B
$$1.0 \mathrm{~A}$$
C
$$\frac{4}{7} \mathrm{~A}$$
D
$$0.8 \mathrm{~A}$$
3
MHT CET 2023 9th May Evening Shift
+1
-0

An alternating voltage of frequency '$$\omega$$' is induced in electric circuit consisting of an inductance '$$L$$' and capacitance '$$C$$', connected in parallel. Then across the inductance coil

A
current is maximum when $$\omega^2=\frac{1}{\mathrm{LC}}$$
B
current is zero
C
voltage is minimum when $$\omega^2=\frac{1}{\text { LC }}$$
D
voltage is maximum when $$\omega^2=\frac{1}{\mathrm{LC}}$$
4
MHT CET 2023 9th May Evening Shift
+1
-0

The reactance of capacitor at $$50 \mathrm{~Hz}$$ is $$5 \Omega$$. If the frequency is increased to $$100 \mathrm{~Hz}$$, the new reactance is

A
$$5 \Omega$$
B
$$10 \Omega$$
C
$$2.5 \Omega$$
D
$$125 \Omega$$
EXAM MAP
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