76701. In the circuit shown in the figure the power dissipated in 30 Ω resistor will be maximum if the value of R is
76702. Which of the following polynomials is not Hurwitz?
76703. A network has 10 nodes and 17 branches. The number of different node pair are
76704. In a series RC circuit Z = (R2 + ω2C2)0.5.
76705. Grading curve is drawn from the test data of:
76706. If V = 20 + j20, then loge(A) A is
76707. In an ac network the sum of currents entering a node is 10 ∠45°. The sum of currents leaving the node is
76708. A parallel RLC network has R = 4Ω, L = 4H, C = 0.25F. Then at resonance Q =
76709. A T network is inserted between source and R as shown in figure. The resistance seen by the source remains the same with or without T network when R is
76710. In figure, the time constant for the capacitor charging is
76711. In figure, the short circuit current through terminal AB will be
76712. The current wave of figure, is passed through a 3 H inductor during the period 0 to 2 seconds
76713. The minimum number of equations required to analyze the circuit shown in the figure is
76714. If Z(s) has a pole at origin, the realization leads to
76715. A series resonant circuit has inductance L. If L is increased, the resonant frequency
76716. In a coupled coil the primary has 100 turns and secondary has 200 turns. The primary produces, a flux Φ = e-t. The coefficient of coupling is 1. The voltages induced in secondary is
76717. With Is disconnected I = - 1, when Is = b is connected, the value of I will become
76718. In a resistor the current is i and the voltage is v. The rate of dissipation of heat at any time t is
76719. When two port networks are connected in cascade, it is more convenient to use hybrid parameters.
76720. If absolute potential of A is - 8 V and that of B is - 16 V, VAB is equal to
76721. An RLC series circuit is excited by 200 V, 100 Hz supply. The current is 20 A. If R = 10 Ω, XL = 50 Ω, XC is
76722. For a given voltage four heating coils will give maximum heat when connected
76723. A system defined by is initially at rest, and x = u(t) sin 2t then the forced response is K sin (2t - θ). The value of θ given by
76724. A well graded sandy soil containing clay is represented by the symbol as per IS classification:
76725. An R-L series circuit has R = 5 Ω and L = .01 H. It is fed by ac 50 Hz supply. The rms current in the circuit is 5 A. The active power supplied by the source is
76726. A particular current is made up of two components 10A dc and sinusoidal current of peak value 14.14A. The average of resultant current is
76727. In figure, the switch is closed at t = 0. After some time i = 6A and rate of change of current was 4A/s. The value of inductor is
76728. Assertion (A): In series R-L-C circuit, the current may lead or lag the voltage depending on the value of R.Reason (R): Phase angle of an R-L series circuit is tan-1 (ωL/R).
76729. An RL impedance function can also be realized as
76730. A step voltages is applied to RLC series circuit having R = 2 Ω, L = 1 H and C = 1 F. The transient current response will be
76731. Class C solid insulators should not be used above 100°C.
76732. Assertion (A): Superposition theorem can be used to find the output of a full wave rectifier excited by sinusoidal signal sources of different frequencies connected in series.Reason (R): Superposition theorem is valid for all linear systems.
76733. The current through a 1 mH inductance is i(t) = 2.56 x 10-2 - 4 x 103 t for 2 ≤ t ≤ 20 μ sec. The voltage across the inductor is
76734. Insulation resistance of a cable is directly proportional to its length.
76735. In the following circuit, i(t) under steady state is
76736. The equivalent circuit of a resistor is shown in the given figure. The resistor will be non-inductive if
76737. For a series RLC circuit bandwidth is ω2 - ω1 = R/2L.
76738. The possibility of quick sand condition will be there when flow of water to soil is:
76739. In figure, the voltage V1 = 4∠0 V. The source voltage V2 is
76740. A capacitor whose capacitance Ct = C0 (1- cos ωt) is fed by a sinusoidal voltage v = V0 sin ωt. The equation for current i is
76741. Figure shows an RC circuit. The magnitude plot V2/V1
76742. Assertion (A): In a circuit having high inductance, reactive power may be more than apparent power.Reason (R): Reactive power = VI sin θ.
76743. A two branch parallel circuit has a 10 Ω resistance and 0.5 H inductance in one branch and a 100 μF capacitor in the second branch. It is fed from 100 V ac supply. At resonance, the source current is
76744. In figure, A is ideal ammeter having zero resistance. It will read __________ ampere.
76745. Threshold of perception occurs at a current of about 1 mA.
76746. The current wave shown in figure is applied by a 0.1 F capacitor at t = 0. At t = 0+, the voltage across capacitor is
76747. A current increasing at the rate of 1 A/s is passed through 1 F capacitor. At t = 0, i = 0. The charge stored after 1 second is
76748. An RLC series circuit has R = 30 Ω, XL = 30 Ω and XC = 30 W. Its impedance is
76749. R, L and C are in parallel. The circuit is switched on to a constant current source I at t = 0. At t = ∞ the current through inductance is I.
76750. A 2 mH inductor with some initial current can be represented as shown below, where s is the Laplace transform variable. The value of initial current is
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