76901. In the circuit of figure the current through 3 Ω resistance at t = 0+ is
76902. Wave A starts its positive half cycle at ωt = 30° and wave B starts its positive half cycle at ωt = 75° then wave B is leading wave A by 45°.
76903. Assertion (A): For networks in figure (1) and (2) sum of products of branch voltages and branch currents at any time is zero.Reason (R): The networks in figure (1) and (2) are not the same structurally.
76904. In the circuit of figure the switch is open for a long time, At t = 0 the switch is closed. At t = 0+ the current supplied by battery is
76905. Assertion (A): The Laplace transform of a ramp is 1/s2.Reason (R): The integral of a unit step function gives an impulse function.
76906. An RL series circuit is initially relaxed. A step voltage E is applied. If t is time constant, voltage across R and L will be equal at t =
76907. For the two port of figure, z11 is
76908. A certain network has two ideal voltages sources and a large number of ideal resistances. The power consumed in one of the resistances is 4 W when either of two sources is active and the other source is active and the other source is short circuited. When both sources is short circuited.When both sources are active, the power consumed in the same resistor would be
76909. A coil of resistance R and inductance L is connected in series with 5 μF capacitor. The source frequency is equal to resonance frequency and circuit current is 0.5 A. Another 5 F capacitor is connected in parallel with the above capacitor. The circuit current will be
76910. A capacitor having capacitance C is raised to voltage V. The energy stored will be
76911. If the p and T circuits in figure are equivalent, then R1, R2, R3 respectively are
76912. In an R-L circuit, the impedance is 30 Ω at a frequency of 100 Hz. At 200 Hz, the impedance should be
76913. In the circuit, Vs = 10 cos ωt, power drawn by the 4Ω resistor is 8 watt. The power factor is
76914. The electric energy required to raise the temperature of a given amount of water is 1000 kWh. If heat losses are 25%, the total heating energy required is __________ kWh.
76915. The circuit in figure, is to be scaled to an impedance level of 5kΩ and resonant frequency of 5 x 106 rad/sec. The possible combination of R, L, C is
76916. In figure, the total power consumed is
76917. If operator 'a' = 1 ∠120° then (1 + a) =
76918. A current wave is i = 100e-60t The initial and final values of current are
76919. Assertion (A): The impedance of a series resonant circuit is minimum at resonance.Reason (R): Resonance condition implies unity power factor condition.
76920. In the circuit of figure the switch is closed at t = 0, At t = 0+ this current through inductance is
76921. In the circuit of figure, the source supplies, 2.25 mA. The value of R must be
76922. The sum of positive real functions
76923. Twelve 1 Ω resistance are used as edges to form a cube. The resistance between two diagonally opposite corners of the cube is
76924. A parallel RLC circuit has ω0 = 106 and Q = 30, Given C = 30 pF, the value of R is
76925. An m derived low pass filter has fc = 1000 Hz and m = 0.6. This filter will have infinite attenuation at
76926. In figure, i(t) is a unit step current. The steady state value of v(t) is
76927. A current 10 sin (200t) A flows through a 5 mH inductance. The expression for voltage is
76928. In figure, capacitor is used to develop pulses of short duration and large duty cycle across R2 when switch is closed. Which of the following combinations is best suited?
76929. In figure, which value of ZL will cause maximum power to be transferred to the load?
76930. A wave trap is a
76931. In following circuit, steady state is reached with S open, S is closed at t = 0, the current I at t = 0+ is given by
76932. In an ac series RLC circuit the maximum phase difference between any two voltages can be
76933. In a series circuit with XL constant and R variable the current locus lies in the third quadrant.
76934. One coulomb charge is equal to the charge on
76935. For the two port of figure, z22 is
76936. The internal impedance of a source is 3 + j 4 Ω. It is desired to supply maximum power to a resistive load. The load resistance should be
76937. In figure readings of the two voltmeters should be
76938. The internal impedance of a source is 3 + j 7 Ω. For maximum power transfer, load impedance should be
76939. In the circuit of figure, the current through battery E3 is
76940. Which arch is statically determinate structure?
76941. Two capacitors of 16 μF each are connected in series. Another capacitor of 16 μF is connected in parallel with this combination. The total capacitance will be
76942. Assertion (A): Operator has a value 1 ∠ - 90° or 1 ∠ 90°.Reason (R): Operator 'a' has a value 1 ∠ 120°.
76943. The maximum current and voltage ratings for a 0.5 W, 10 kW resistor are
76944. Figure shows a pole zero plot of I(s). The likely current response in time domain is
76945. A system has transfer function The dc gain is
76946. In a series RLC circuit, the current at resonance is I0 the total energy stored in the circuit at resonance is
76947. If J, I and a denote current density, current and area of cross section of a conductor, then
76948. Which of the following is a force method?
76949. If A = 3 + j1, A4
76950. A low pass single pole filter has a the corner frequency and its phase shift are
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