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( 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.

Show Answer Report Discussion in forumAnswer : 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.

Show Answer Report Discussion in forumAnswer : 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.

Show Answer Report Discussion in forumAnswer : 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) V_{s}, I_{s}.
 3) both 1 & 2
 4) none of these.

Show Answer Report Discussion in forumAnswer : 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.

Show Answer Report Discussion in forumAnswer : 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.

Show Answer Report Discussion in forumAnswer : 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°

Show Answer Report Discussion in forumAnswer : 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.

Show Answer Report Discussion in forumAnswer : 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

Show Answer Report Discussion in forumAnswer : 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 Opamp?
 1) Low gain to differential mode signal
 2) Cancel difference mode signal
 3) Low gain to common mode signal
 4) Cancel common mode signal

Show Answer Report Discussion in forumAnswer : 4) Cancel common mode signal
Solution : Cancel common mode signal
discussion
Answer : 4) Cancel common mode signal
