77651. When analysing two port networks in cascade, it is more convenient to use
77652. For a transfer function H(s) = P(s)/Q(s), where P(s) and Q(s) are polynomials in s
77653. The inductance of a coil can be increased by
77654. The dual of quantity charge is
77655. Consider the following statement : If a network has an impedance of (1 - j) as a specific frequency, the circuit would consist of series R and CR and LR, L and C Which of the statement are correct?
77656. The minimum permissible size of aluminium cable for lighting circuit is
77657. Assertion (A): In a parallel circuit having two branches, each branch current may be more than source current.Reason (R): Calculations in ac circuits use rules of complex algebra.
77658. Which one of the following parameters does not exist for the two port network shown in the given figure?
77659. Current density J, conductivity σ and electric field E in a conductor are related as
77660. The condenser in indirect system,condenses:
77661. The ratio of active power to apparent power is known as __________ factor.
77662. A pole zero plot of a filter is shown in figure. It is
77663. Two RLC series circuit has same damping ratio. Circuit 1 has higher natural frequency as compared to circuit 2. Then
77664. In an idealized half wave rectified system the average and r.m.s. values of voltage are __________ respectively.
77665. A function f(t) = k eat is __________ for (a > 0).
77666. The peak factor is the ratio of
77667. In attenuation band, β is an odd multiple of p .
77668. Which of the following is correct? The circuit shown in the figure. is reciprocal but not symmetricalis not reciprocal but symmetricalboth reciprocal and symmetricalneither reciprocal nor symmetrical
77669. In a series RLC circuit, the value of resistance for critical damping is
77670. A capacitor is considered to be completely charged in __________ time constant.
77671. For an m-derived high pass filter
77672. Consider the following statements associated with two port networks. Z12 = Z21Y12 = Y21h12 = h21AD - BC = 1 Which one of the statement given above are correct?
77673. Assertion (A): The number of basic loops is equal to number of links.Reason (R): The graph theory helps in choosing independent variables in circuit analysis.
77674. In an R-L-C circuit, v(t) = 20 sin (314 t + 5 p /6) and i(t) = 10 sin (314 t + 2p /3). The p.f of the circuit is
77675. In any network of linear impedances the current flowing at any point equal to algebric sum of currents caused to flow at that point by each of the emf taken separately with all other emfs reduced to zero. The statement represents.
77676. The Kirchoff's laws fail in which of the following circuits?
77677. A black box has one of the elements our of R, L, C. when a 220 V a supply is connected the current supplied by source is I. when a 0.1 F capacitor is connected in parallel with the box, the current is 2I. The element is
77678. In figure, the switch has been in closed position for a long time. At t = 0, the switch is opened. At t = 0+, the current R1 is
77679. The expression for the resonant frequency ω0 in the circuit shown
77680. The phase difference between them is __________ degrees.
77681. Norton's theorem reduces a two terminal network to
77682. For a two- port reciprocal network, the output open circuit voltage divided by the input current is equal to
77683. If H(s) is positive real, 1/H(s)
77684. Open-circuit voltage is the potential difference between two point when the impedance between these points is
77685. A network has two sources of different frequencies. The only method of analysis which can be used to find current and voltages of different branches is the use of
77686. For a series R-L-C circuit tuned at resonant frequency which of the following statements is correct?
77687. A network contains linear resistors and ideal voltage sources. If values of all the resistors are doubled, then the voltage across each resistor is
77688. If operator 'a' = 1 ∠120° then (1 + a + a2) =
77689. In a parallel resonant circuit, the circuit current at resonance is maximum.
77690. The rms value of wave in figure is
77691. An RLC series circuit is underdamped. To make it overdamped, the value of R
77692. Henry is equivalent to
77693. High side float valve is fitted on the condensing unit just after the:
77694. According to Ohm’s law I=
77695. 13When air is heated relative humidity
77696. Which chemical is used for condenser descaling?
77697. Which refrigerant charged in car C?
77698. The pipes which are used for absorption refrigeration system:
77699. A semiconverter feeding an RLE load operates in
77700. The phenomenon of overlap in converter operation due to
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