76801. In an infinite ladder Ckt as shown above each resistance of rΩ then RAB
76802. A series resonant circuit has R = 2 Ω, L = 0.1 H and C =10 μF. At resonance applied voltage = 10 ∠0 V. Voltage across inductance is likely to be
76803. The admittance parameter Y12 in the 2 port network in the figure
76804. A 20 Ω resistor, a 1H inductor and 1μF capacitor are connected in parallel the combination is driven by a unit step current. Under the steady state, source current flows through
76805. A series resonant circuit has parameters 10 ω, 1 H and 0.1 F. It is excited by a voltage v = 100 sin ωt. At resonant frequency, the power dissipated in the circuit is
76806. Assertion (A): A tree of graph contains all the nodes of the graph.Reason (R): The number of links is always less than the number of tree branches.
76807. Cells are connected in series to increase
76808. The low pass filter characteristic shown in figure realizable.
76809. Assertion (A): The s domain impedance of a series R-L circuit is R + sL irrespective of initial conditions.Reason (R): Complex frequency s = σ + jω.
76810. If Va = 10 ∠0, Vb = 10 ∠ -120° and Vc = 10 ∠ -240°, then Va2 and Va0 are
76811. A wire has a diameter d and resistance R. If the diameter is made 3d, the length and material remaining the same, the new value of resistance will be
76812. The realization of a reactance function gives
76813. The correct relation between energy and charge is
76814. A two branch parallel tuned circuits has a coil of resistance R and inductance L in one branch and capacitance C in the second branch. The bandwidth is 200 radians/sec. A load of resistance RL is connected in parallel. The new bandwidth will be
76815. The correct relation between joules and calories is
76816. The filter in figure, uses ideal op-amp. It is
76817. For a rectified sinusoidal wave clipped at 0.707 its peak value (figure), the average value is
76818. A voltage v = 100 sin (100 p t + 45°) V is applied to an impedance 10 + j10 ohm. The current is
76819. If P = 250 W and p.f. = 0.707 lagging, Q =
76820. Figure shows an R-L circuit. The current is i = 1 - e-t. The rate of change of current at t = 1 second is
76821. Assertion (A): Energy stored in inductance is and that in capacitance is Reason (R): Inductance and capacitance are dual of each other.
76822. The time constant of the circuit after the switch shown in the figure is opened is
76823. A series RLC circuit is at resonance at 200 Hz. If capacitance is increased to four times, the circuit will be in resonance at
76824. A system function the resonant frequency in rad/sec and bandwidth in rad/sec. is given by
76825. The temperature coefficient of copper is 0.00393 at 20° C. At 50° C the temperature coefficient is
76826. To determine the polarity of voltage drop across a resistor, it is sufficient to know
76827. A sawtooth current wave is passed through a resistance
76828. Static sheep foot roller is most effective in compacting:
76829. Assertion (A): If A = 0.5 ∠ 20°, A2 = 0.25 ∠ 40°.Reason (R): When drawing a phasor diagram, sinusoids may have the same or different frequencies.
76830. Two passive elements are connected in series and a dc voltage is applied to the circuit. The time variation of the current is shown in figure. The two elements are
76831. Which statement is incorrect for parallel resonance?
76832. If a capacitor is charged by a square wave current source the voltage across the capacitor is
76833. The equivalent resistance between terminals x and y figure is
76834. The purpose of earthing electric appliances is
76835. Three impedances (3 + j 4) Ω each are connected in star. The impedances of equivalent delta circuit will be
76836. Find Vth in the circuit
76837. A heater is rated at 230 V, 5 A AC. Then
76838. KCL is a statement of principle of conservation of energy.
76839. In an underdamped RLC series circuit, the natural frequency is ωn. The frequency of damped oscillations is
76840. The equivalent inductance measured between the terminals 1 and 2 for the circuit shown in the figure is
76841. A dc network has 3 independent nodes and 4 loops. In total analysis, the number of equations is
76842. In the circuit, S was initially open. At time t = 0, S is closed. When the current through the inductor is 6 A, the rate of change of current through the resistor is 6 A/s. The value of the inductor would be
76843. A series circuit has R = 5 Ω and C = 10 μF. It is switched on to a 12 V dc battery at t = 0. The current in the circuit will be maximum
76844. If V = 4 in the figure, the value of Is is given by
76845. A current of 1 A in the coil of an iron cored electromagnet causes B = 0.5T. If current is 2A, B =
76846. Two current sources each of rms value 10 A have frequencies 40 Hz and 50 Hz respectively. They are connected in series, the expression for resultant wave is
76847. To find the current in a 20 Ω resistance connected in a circuit, Norton's theorem is used. IN = 7.5 A. The current though 20 Ω resistance.
76848. While calculating Norton's resistance, all current sources are short circuited.
76849. The voltage of the source in circuit shown __________ if i(t) = - 20e-2t is
76850. In an R-L-C series circuit, R = 2/L/C . If R is doubled