AE & JE EE Quiz: Basic Electrical and Network Theory Booster Quiz -3

Consider the following statements:

(i) In a parallel resonance circuit if value of resistance gets twice. Quality factor decreases to half.

(ii) For a critical damped circuit quality factor is .

(iii) If we increase the quality factor, the damping ratio will decrease.

(iv) Series R-L-C circuit at resonance, behaves as voltage magnifier circuit.

Which of the above statements are correct?

In a 3-phase 3-wire supply feeds a star connected load consist of 3 equal resistors. If one of the resistor is to be removed, then the relation between previous power (P₁) and current power (P₂) is ___________.

For the circuit shown below, the voltage across the 9Ω resistor is

The Q factor of a series RLC circuit is 10 at its resonance frequency of 20 kHz. Find the bandwidth of the circuit

The RMS value of the following function will be:

f(t) = 3 + sin (10t + 30°) – 5 cos (20t+ 45°) + 2 sin (30t + 60°)

In a certain series circuit, V_C = 120 V, V_L = 150 V and V_R = 40 V, then the source voltage is

In the circuit as shown in figure, the switch is closed at t = 0. The current through the capacitor will decrease exponentially with a time constant of magnitude

In a circuit, voltage across an element is V(t) = 45 sin (2t + 60°) and current through the element is i(t) = 15 sin (2t – 30°). Determine the circuit element and its value.

If two inductive coils are connected in parallel with an inductance of L₁ and L₂ in additive nature. Then equivalent inductance is?

An alternating current i(t) = 10sin where is the  is the angle of leading of current from voltage V(t), if the angle of leading is 55° then find the instantaneous value of current at t = 0.1 sec.