• ( 1 ) With some initial change at t = 0+, a capacitot will act as

    • 1) short circuit.
    • 2) open circuit.
    • 3) a voltage source.
    • 4) a current source.
    • Discussion in forum
      Answer : 3) a voltage source.
      Solution : At t = 0+, the capacitor starts charging to a particular voltage and acts as a voltage source.








      discussion


      Answer : 3) a voltage source.

    • ( 2 ) If a circuit does not contain any source of energy or emf, it is known as

    • 1) unilateral circuit.
    • 2) bilateral circuit.
    • 3) active network.
    • 4) passive network.
    • Discussion in forum
      Answer : 4) passive network.
      Solution : When a network does not contain any source of e.m.f., it is called passive network. A passive network consists of resistance, inductance or capacitance as passive element. A passive network does not contains any source of energy and the input port serve as load terminal. It may have output terminal.








      discussion


      Answer : 4) passive network.

    • ( 3 ) Active element of electrical circuit is

    • 1) voltage source.
    • 2) current source.
    • 3) both 1 & 2
    • 4) none of these.
    • Discussion in forum
      Answer : 3) both 1 & 2
      Solution : Active elements or sources - these are elements which can source electrical power; examples are voltage sources and current sources. They can be used to represent ideal batteries and power supplies








      discussion


      Answer : 3) both 1 & 2

    • ( 4 ) The basic circuit elements are

    • 1) R, L and C.
    • 2) Vs, Is.
    • 3) both 1 & 2
    • 4) none of these.
    • Discussion in forum
      Answer : 1) R, L and C.
      Solution : Resistance R, measured in ohms - produces a voltage proportional to the current flowing through the element. Relates voltage and current according to the relation dV = RdI.
      Capacitance C, measured in farads - produces a current proportional to the rate of change of voltage across the element. Relates charge and voltage according to the relation dQ = CdV.
      Inductance L, measured in henries - produces the magnetic flux proportional to the rate of change of current through the element. Relates flux and current according to the relation dφ = LdI








      discussion


      Answer : 1) R, L and C.

    • ( 5 ) The linear circuit element is

    • 1) capacitor.
    • 2) inductor.
    • 3) resistor.
    • 4) all of above.
    • Discussion in forum
      Answer : 3) resistor.
      Solution : The linear circuit element is resistor.








      discussion


      Answer : 3) resistor.

    • ( 6 ) Clamping circuits are one which inserts

    • 1) AC component in signal.
    • 2) DC component in signal.
    • 3) both AC and DC.
    • 4) none of these.
    • Discussion in forum
      Answer : 2) DC component in signal.
      Solution : Clamping circuits are one which inserts DC component in signal.








      discussion


      Answer : 2) DC component in signal.

    • ( 7 ) A certain AC circuit has resistance of 10 Ω and impedance of 20 Ω. The phase angle of voltage and current of the circuit is

    • 1) 60°.
    • 2) 30°.
    • 3) 90°.
    • 4) 45°
    • Discussion in forum
      Answer : 1) 60°.
      Solution : A certain AC circuit has resistance of 10 Ω and impedance of 20 Ω. The phase angle of voltage and current of the circuit is 60°.








      discussion


      Answer : 1) 60°.

    • ( 8 ) An electrical circuit with 10 branches and 7 nodes will have

    • 1) 10 loop equations.
    • 2) 7 loop equations
    • 3) 3 loop equations.
    • 4) 4 loop equations.
    • Discussion in forum
      Answer : 4) 4 loop equations.
      Solution : An electrical circuit with 10 branches and 7 nodes will have 4 loop equations.








      discussion


      Answer : 4) 4 loop equations.

    • ( 9 ) Current is measured by a(n) __________.

    • 1) voltmeter
    • 2) ammeter
    • 3) ohmmeter
    • 4) electrometer
    • Discussion in forum
      Answer : 2) ammeter
      Solution : Current is measured by a(n) ammeter.








      discussion


      Answer : 2) ammeter

    • ( 10 ) What is the purpose of differential amplifier stage in internal circuit of Op-amp?

    • 1) Low gain to differential mode signal
    • 2) Cancel difference mode signal
    • 3) Low gain to common mode signal
    • 4) Cancel common mode signal
    • Discussion in forum
      Answer : 4) Cancel common mode signal
      Solution : Cancel common mode signal








      discussion


      Answer : 4) Cancel common mode signal





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