Related InterviewSolutions

• For i = i0 sin ωt. irms /iav is(A) \(\cfrac{\pi}{2\sqrt2}\)(B) \(\cfrac{2\sqrt2}{\pi}\)(C) \(\cfrac{\pi}{\sqrt2}\)(D) \(\cfrac{\sqrt2}{\pi}\)
• What is an acceptor circuit ? State its use.
• Distinguish between an acceptor circuit and a rejector circuit.
• What is a rejector circuit? State its use
• State the characteristics of a parallel LC AC resonance circuit.
• The current in an LC circuit at resonance is called (A) the displacement current (B) the idle current(C) the wattless current (D) the apparent current.
• In a circuit L, C & R are connected in series with an alternating voltage of frequency f. the current leads the voltage by 450. The value of C is(A) \(\cfrac{1}{\pi f(2 \pi f L-R)}\)(B) \(\cfrac{1}{2\pi f(2 \pi f L-R)}\)(C) \(\cfrac{1}{\pi f(2 \pi f L+R)}\)(D) \(\cfrac{1}{2\pi f(2 \pi f L+R)}\)
• If AC voltage is applied to a pure capacitor. then voltage acrose the capacitor . (A) leads the current by phase angle (π/2 ) rad (B) leads the current by phase angle π rad (C) lags behind the current by phase angle (π/2 ) rad (D) lags behind the current by phase angle π rad.
• The total impedance of a circuit decreases when a capacitor is added in series with L and R. Explain why ?
• What is wattless current ?