77051. A practical Parallel resonant circuit has a coil in Parallel with a 0.14 μf capacitor. The coil has an inductance of 1 mH and a resistance of 10 ohms. The Q of the circuit is
77052. An AC circuit has two branches in parallel. The current in one branch is 5 A. Then the current source
77053. The electrolyte in a dry cell is completely dry.
77054. A series RLC circuit has a resonant frequency of 2000 Hz. The maximum voltage across C is likely to occur at a frequency of about
77055. Assertion (A): Thevenin's theorem and Norton's theorem are dual of each other.Reason (R): Voltage source can be converted into current source and vice versa.
77056. In the network shown in figure, the voltage drops across R2 and R3 are 10 V and 16 V with polarities as shown. The current in R1
77057. A coil has a resistance of 2 Ω and inductance of 0.1 mH. The applied voltages is suddenly increased from 10 V to 20 V. After steady state condition have reached, the current is
77058. Which of the following is generally not designed for shear?
77059. The V-i relation for a varistor is
77060. For 2 port reciprocal network, o.c. output voltage divided by input current is equal to
77061. The energy dissipated W in a resistance having voltages v and current i is given by
77062. In figure, the current through 2 Ω resistance is
77063. An RC impadence function has a pole at s = 0. The first element in the Foster form of synthesis
77064. μ0 = 8.85 x 10-12F/m.
77065. A series RC circuit has fixed XC, and variable R. The current locus is in the first quadrant.
77066. One limitation of constant k filters is that Z0 is not constant in the pass band.
77067. An m derived and constant k filter section connected in cascade give
77068. At resonance, the parallel circuit constituted by an iron-cored coil and a capacitor behaves like
77069. For an RC admittance function Y, the slope dY/dσ
77070. Carbon resistances are used in very high values.
77071. In a linear bilateral passive element two port which of the following holds for z parameters?
77072. During discharging a capacitor through a resistance, voltages across R and C are equal in magnitude.
77073. In an RLC series circuit having finite values of RLC, the phase difference between applied voltage and current is
77074. In ZRC (s) = 0 at s =∞, the last element in second Foster realization will be
77075. Assertion (A): The dual of a circuit can be drawn by window-dot method. Reason (R): The principle of duality is of great help in circuit analysis.
77076. A short-circuit is that which is
77077. In the voltage equation v = 500 e-5t sin (2p 50t), the frequency is
77078. The nodal method of circuit analysis is based on
77079. In figure, the current I
77080. Pico-farad is equal to
77081. A network has only independent current sources and resistance. If values of all resistors are doubled, the values of node voltages
77082. Which of the following is/are correct? The circuit shown in the figure.is reciprocalhas Z11 = 2, Z22 = 2has Z11 = 4, Z22 = 2has Z11 = 0, Z22 = 2 Select the correct answer using the code given below:
77083. A sine wave of voltage varies from zero to maximum of 200V. How much is the voltage at the instant of 30° of the cycle?
77084. In the figure shown, assume that all the capacitors are initially unchanged and Vi(t) = 10 U(t) volts then V0(t) is given by
77085. For the network in figure, the correct loop equation for loop 3 is
77086. Force = Electric intensity x current.
77087. In a R-L-C circuit at resonance is
77088. The zeros of a minimum phase function lie on
77089. A network contains only independent current source and resistors. If the values of all resistors are doubled, the value of the node voltage
77090. In RCC columns if ties are not provided,the column will likely to:
77091. A surface water tank will be economical if the shape is:
77092. ’AT-shaped’retaining wall consists of:
77093. The time constant of an R.C. circuit increases if the value of resistance is
77094. For an RC impedance function
77095. Assertion (A): In high Q circuits poles of Y(s) lie close to ω axis in complex frequency plane.Reason (R): Q is inversely proportional to damping factor.
77096. If the ratio p(s)/q(s) represents a transfer function then
77097. In the above circuit, if the power dissipated in the 6 Ω resistor is zero then V is
77098. If Va1 = Va2 = 100 V and Va0 = 0, then Va, Vb, Vc are
77099. Assertion (A): A series RLC circuit resonates when excited by variable frequency source.Reason (R): Resonant frequency is geometric mean of half power frequencies.
77100. In figure, the switch S is initially open and steady state conditions are reached. At t = 0 switch is closed. The initial current through 2C capacitor is
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