Questions & Answers of KCL, KVL

Question No. 25

RA and RB are the input resistances of circuits as shown below. The circuits extend infinitely in the direction shown. Which one of the following statements is TRUE?

Question No. 27

In the portion of a circuit shown, if the heat generated in 5 Ω resistance is 10 calories per second, then heat generated by the 4 Ω resistance, in calories per second, is _______.

Question No. 63

A dc voltage with ripple is given by vt=100+10sinωt-5sin3ωt volts. Measurements of this voltage vt, made by moving-coil and moving-iron voltmeters, show readings of V1 and V2 respectively. The value of V2V1, in volts, is _________.

Question No. 65

In the circuit shown below, the node voltage VA is ___________ V.

Question No. 122

The voltage (V) and current (A) across a load are as follows.

vt=100sinωt ,

 it=10sinωt-60°+2sin3ωt+5sin5ωt

The average power consumed by the load, in W, is___________.

Question No. 133

In the circuit shown below, the voltage and current sources are ideal. The voltage (Vout) across the current source, in volts, is

 

Question No. 28

The voltages developed across the 3 Ω and 2 Ω resistors shown in the figure are 6V and 2V respectively, with the polarity as marked. What is the power (in Watt) delivered by the 5V voltage source?

Question No. 32

The self inductance of the primary winding of a single phase, 50 Hz, transformer is 800 mH, and that of the secondary winding is 600 mH. The mutual inductance between these two windings is 480 mH. The secondary winding of this transformer is short circuited and the primary winding is connected to a 50 Hz, single phase, sinusoidal voltage source. The current flowing in both the winding is less than their respective rated currents. The resistance of both windings can be neglected. In this connection, what is the effective inductance (in mH) seen by the source?

Question No. 57

In the given circuit, the parameter k is positive, and the power dissipated in the 2Ω resistor is 12.5 W. The value of k is________.

 

Question No. 129

The current i (in Ampere) in the 2 Ω resistor of the given network is ____ .

Question No. 154

In the given network V1=1000°0°V, V2=100-120°V, V3=100+120°V. The phasor current i (in Ampere) is

Question No. 216

The line A to neutral voltage is A1015oV for a balanced three phase star-connected load with phase sequence ABC. The voltage of line B with respect to line C is given by

Question No. 240

The power delivered by the current source, in the figure, is ________.

Question No. 4

In the circuit shown below, the current through the inductor is

Question No. 11

A two-phase load draws the following phase currents: i1t=Imsinωt-Φ1, i2t=Imcosωt-Φ2.These currents are balanced if Φ1 is equal to

Question No. 16

The average power delivered to an impedance (4-j3)Ω by a current 5cos100πt+100A is

Question No. 28

If VA-VB=6V, then VC-VD is

Question No. 3

The r.m.s value of the current i(t) in the circuit shown below is

Question No. 15

The voltage applied to a circuit is 100 2 cos (100πt) volts and the circuit draws a current of 10 2 sin (100πt + π / 4) amperes. Taking the voltage as the reference phasor, the phasor representation of the current in amperes is

Question No. 48

The input voltage given to a converter is
vi=1002sin100πtV

The current drawn by the converter is
ii=102sin100πt-π3+52sin300πt+π4+22sin500πt-π6 A

The input power factor of the converter is

Question No. 49

The input voltage given to a converter is
vi=1002sin100πtV

The current drawn by the converter is
ii=102sin100πt-π3+52sin300πt+π4+22sin500πt-π6 A

The active power drawn by the converter is

Question No. 50

An RLC circuit with relevant data is given below.

The power dissipated in the resistor R is

Question No. 51

An RLC circuit with relevant data is given below.

The current IC in the figure above is

Question No. 7

As shown in the figure, a 1Ω resistance is connected across a source that has a load line v+ i = 100. The current through the resistance is

Question No. 33

If the 12Ω resistor draws a current of 1A as shown in the figure, the value of resistance R is

Question No. 7

The current through the 2 kΩ resistance in the circuit shown is

Question No. 24

The equivalent capacitance of the input loop of the circuit shown is

Question No. 47

For the circuit shown, find out the current flowing through the 2Ω resistance. Also identify the changes to be made to double the current through the 2Ω resistance

Question No. 2

The Thevenin’s equivalent of a circuit operation at ω = 5 rads/s, has Voc=3.71-15.9°Vand Zo=2.38-j0.667Ω.At this frequency, the minimal realization of the Thevenin’s impedance will have a

Question No. 23

Assuming ideal elements in the circuit shown below, the voltage Vab will be

Question No. 26

In the circuit shown in the figure, the value of the current i will be given by

Question No. 50

The state equation for the current I1 in the network shown below in terms of the voltage Vx and the independent source V, is given by

Question No. 63

In the figure given below all phasors are with reference to the potential at point "O". The locus of voltage phasor VYX as R is varied from zero to infinity is shown by

(A)

(B)

(C)

(D)

Question No. 64

A 3 V DC supply with an internal resistance of 2 Ω supplies a passive non-linear resistance characterized by the relation VNL = I2NL. The power dissipated in the non-linear resistance is