AIIMS 2018 | Alternating Current Question 6 | Physics

In a circuit $$L, C$$ and $$R$$ are connected in series with an alternating voltage source of frequency $$f$$. The current leads the voltage by $$45^{\circ}$$. The value of $$C$$ is

$$\frac{1}{2 \pi f(2 \pi f L+R)}$$

$$\frac{1}{\pi f(2 \pi f L+R)}$$

$$\frac{1}{2 \pi f(2 \pi f L-R)}$$

$$\frac{1}{\pi f(2 \pi f L-R)}$$

AIIMS 2017

MCQ (Single Correct Answer)

-0.33

A series R-C circuit is connected to AC voltage source. Consider two cases; (A) When C is without a dielectric medium and (B) When C is filled with dielectric of constant 4. The current I$$_R$$ through the resistor and voltage V$$_C$$ across the capacitor are compared in two cases.

$$I_R^A> I_R^B$$

$$I_R^A< I_R^B$$

$$V_C^A< V_C^B$$

None of these

AIIMS 2017

MCQ (Single Correct Answer)

-0.33

Assertion : The average value of alternating emf is $$63.39 \%$$ of the peak value.

Reason : The rms value of alternating emf is $$70.72 \%$$ of peak value.

Both assertion and reason are true and reason is the correct explanation of assertion

Both assertion and reason are true but reason is not the correct explanation of assertion

Assertion is true but reason is false

Both assertion and reason are false.

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