76751. As temperature increases, the temperature coefficient of metals increases.
76752. In a 3 phase system, the zero sequence component of line to line voltages is zero
76753. Magnetic effect of current is used in generators but not in motors.
76754. For a nonlinear resistance
76755. The Z parameters Z11 and Z21 for the 2-port network in the figure.
76756. For the wave shown in figure, the average value is
76757. Assertion (A): For a physically realisable driving point function, the degree of numerator and denominator should be equal.Reason (R): The sum of positive real functions is real.
76758. In the figure circuit, V1 = 40 V. When R is 10 Ω. When R is zero, the value of V2 will be
76759. Compaction of soil is measured in terms of:
76760. In the circuit shown in the given figure, RL will absorb maximum power when its value is
76761. In an RC series circuit excited by dc voltage E, the current at t = 0 is
76762. The current through a 10 Ω resistance in a dc circuit having two emf sources is 3A. If this resistance is changed to 20 Ω, the new value of current will be
76763. A planar graph has 6 nodes and 7 branches. The number of meshes in the dual graph is
76764. An ac voltage 20 sin 1000t feeds an R-C series circuit. R = 8 Ω and active power is 4 W. The power factor is
76765. For a sine wave the average value is calculated over half the cycle.
76766. Two resistances of 2 Ω each are connected in series. A shunt having zero resistance is connected across the combination. The overall resistance will be
76767. The poles and zeros of a positive real function
76768. In a linear circuit, the superposition principle can be applied to calculate the
76769. If A = 7 ∠15, A2 is
76770. The colour coding of a resistors shows 100 K, ± 10%. When the resistance was measured with an ohmmeter, it read
76771. The output voltage of a charger is
76772. The circuit in figure has reached steady values with switch open. If switch is closed at t = 0 the voltage across 2 μF capacitance at t = 0+ is
76773. In the circuit of figure
76774. As per BIS, solid insulators are classified into 6 categories.
76775. Dielectric constant of air is about 5.
76776. Consider the following units sec-1rad2/sec2secΩ The units of , RC and are respectively
76777. In a conductor, voltage v, conductance G and charges q are related as
76778. The current wave in figure is passed through 3 H inductor. The voltage across inductance during the period 2 < t < 3 seconds is
76779. In figure, the charge on 0.8 μF capacitor is
76780. Maximum power transfer theorem finds application in
76781. In a series L-C circuit fed by ac voltage, voltage drops across L and C are 40 V and 30 V respectively. The supply voltage is
76782. In a reactance function
76783. In figure, the switch is closed at t = 0 when current through inductor is 6 A, the rate of change of current through resistor is 6 A/s. The value of L is
76784. In figure, the switch is closed at t = 0. At t = 0+, di/dt = 4 A/s. Then V =
76785. In figure V is ideal voltmeter having infinite resistance. It will read __________ volt.
76786. The equivalent inductance seen at terminals A - B is
76787. If sequence currents Ia1 = 2 ∠- 90°, Ia2 = 0.2 ∠ 90° and Ia3 = 1.8 ∠ 90°, Ia =
76788. If f(t) = - f(- t) and f(t) satisfies Dirichlet conditions, then f(t) can be expanded in Fourier series having
76789. Which of the following theorems can be conveniently used to find power consumed in 10 Ω resistor in figure?
76790. In the circuit of figure is
76791. The VTH at terminals A and B is equal to
76792. Consider the followingIf a network has impedance (1 - j) at a specific frequency, the circuit would consists of series R and CR and LR, L and C Which of these statements is correct?
76793. Assertion (A): Power is the rate at which energy is supplied.Reason (R): Energy = VIt.
76794. The circuit in figure, the switched on at t = 0. After a long time the current through 5 Ω resistance is
76795. If A = 3 + j1 and B = 4 + j3, A - B =
76796. Two impedances 10 - j 10 and 10 + j 10 are connected in parallel. Their combined impedance is
76797. Resistivity of semiconductors is around 100 Ω-m.
76798. Two capacitors of 20 μF each are in series. The total capacitance is
76799. Thevenin's theorem is used to find current in a branch of a network. It is now desired to find current in another branch of the network
76800. In the circuit of figure the current through 5 Ω resistance at t = ∞ is
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