AE-JE Foundation EE : Circuit Theory Quiz - 8

In an RL type high-pass filter, R = 2.2 kΩ and f_e = 1800 Hz. Determine the value of L.

Two bulbs rated 500 W, 250 V each are connected in series across 250 V, 50 Hz supply. The total power supplied from the source will be

An alternating voltage is given by V = 75 sin (100πt – 0.25) volts. Find the time period of the waveform.

For a given inductor, the value of inductance is ‘L’, the number of turns is ‘N’, relative permeability (μ_r) is ‘1’ the area of cross-section is ‘A’ and the length of the core is ‘l’. If the inductor is immersed in liquid having μ_r = 0.25, then the value of new inductance will be

The iron cored coil with series connection is shown in figure below.

The magnitude of the net impedance of coil is _____ Ω.

In the circuit shown, the value of the power delivered by the 4V source is

For the given circuit, the voltage across inductor V_L(t) when switch is closed at t = 0 with zero initial condition is

A circuit consisting of two pure elements connected in series has voltage and current as:

v = 40 sin (1000t + 30°) volts

i = 8 cos (1000t + 20°) amps

The value of resistance in the circuit is

In the network given below, if the voltage ‘V’ at time t = 0 is 25 V, then  will be

Consider the following statements for a network graph, if B_f is its fundamental tie set matrix, and B_t and B_l are its sub-matrices corresponding to twigs and links, respectively:

1) B_t is a unit matrix

2) B_l is a rectangular matrix

3) Rank of B_f is (b – n – 1)

where b is the number of branches and n is the number of nodes.

Which of the above statements are correct?

In the circuit of figure, calculate the input impedance and current I₁?

Take Z₁ = 60 – j100 Ω, Z₂ = 30 + j40 Ω and Z_L = 80 + j60 Ω.