Synopsis of Electrical Engineering

Important Multiple Choice Questions in Electrical Circuits 1.        If a capacitor is energised by a symmetrical square wave current source, then the steady state voltage across the capacitor will be A)      Square wave B)       Triangular wave C)       Step wave D)      Impulse wave 2.        If the step response of an initially relaxed circuit is known, then the ramp response can be obtained by A)      Integrating the step response B)       Differentiating the step response C)       Integrating the step response twice D)      Differentiating the step response twice 3.        A water boiler of home is switched on to the AC mains supplying power at 230V/50Hz. Th frequency of instantaneous power consumed by the boiler is A)      0 Hz B)       50 Hz C)       100 Hz D)      150 Hz 4.        In a series RLC high Q circuit, the current peaks at a frequency A)      Equal to the resonant frequency B)       Greater than the resonant frequency C)      

Important Multiple Choice Questions in Electrical Circuits 1.        When a number of 2 port networks are connected in cascade, then equivalent can be obtained by A)      Adding individual Z matrices B)       Adding individual Y matrices C)       Multiplying  individual Chain matrices D)      Multiplying  individual h matrices 2.        A periodic function is said to have a quarter wave symmetry, if it possesses A)      Even symmetry at an interval of quarter of a wave B)       Even symmetry and half-wave symmetry only C)       Even or odd symmetry without the half wave symmetry D)      Even or odd symmetry with the half wave symmetry 3.        A ramp voltage v(t)=100 V, is applied to an RC differentiating circuit with R=5kΩ and C=4 μF. The maximum output voltage is A)      0.2 V B)       2 V C)       10V D)      50 V 4.        The reciprocal of a network function is A)      An immittance function, if the original function is an omittance function

Important Multiple Choice Questions in Electrical Circuits 1.        The energy stored in the magnetic field at a solenoid 30 cm long and 3 cm diameter wound with 1000 turns of wire carrying a current at 10A, is A)      0.015 Joule B)       0.15 Joule C)       0.5 Joule D)      1.15 Joule 2.        For a transfer function H(s)= P(s)/Q(s), where P(s) and Q(s) are polynomials in s. Then A)      The degree of P(s) is always greater than the degree of Q(s) B)       The degree of P(s) and  Q(s) are same C)       The degree of P(s) is independent of the  degree of Q(s) D)      The maximum degree of P(s) and  Q(s) differ at most by one 3.        The resistance of a strip of copper of rectangular cross section is 2Ω. A metal of resistivity twice that of copper is coated on its upper surface to a thickness equal to that of copper strip. The resistance of composite strip will be A)      6Ω B)       4/3Ω C)       3/2Ω D)      3/4Ω 4.        The copper armatur