**Description :** Write the steps for finding the current through an element by Thevenin’s theorem.

**Last Answer :** Steps to find Thevenin's equivalent circuit, taking an example is as follows: 1. From the given circuit (fig.a),Remove RL from the terminals A and B and redraw the circuit as shown in ... (fig.d)from where it was temporarily removed earlier. Current flowing through RL is given by

**Description :** Can we apply the superposition theorem to AC circuit?

**Description :** Can we apply Norton's theorem in an AC circuit?

**Description :** State maximum power transfer theorem for DC circuit.

**Last Answer :** Maximum power transfer theorem for DC circuit: The maximum power transfer theorem states that the source or a network transfers maximum power to load only when the load resistance is equal ... removed (disconnected) ii) All internal independent sources are replaced by their internal resistances.

**Description :** State the Thevenin’s theorem. Also write stepwise procedure for applying Thevenin’s theorem to simple circuits.

**Last Answer :** Thevenin's Theorem: Any two terminal circuit having number of linear impedance and sources (voltage, current, dependent, independent) can be represented by a simple equivalent circuit consisting of a single voltage ... 's equivalent circuit: Step V: Determination of Load current:

**Description :** State Thevenin’s Theorem.

**Last Answer :** Any two terminal circuit having number of linear impedances and sources (voltage, current, dependent, independent) can be represented by a simple equivalent circuit consisting of a single voltage ... circuit across the two terminals, when the sources are replaced by their internal impedances.

**Description :** While calculating Rth in Thevenin's theorem and Norton equivalent?

**Last Answer :** While calculating Rth in Thevenin's theorem and Norton equivalent all independent sources are made dead.

**Description :** In Thevenin's theorem, to find Z?

**Last Answer :** In Thevenin's theorem, to find Z all independent voltage sources are short circuited and all independent current sources are open circuited.

**Description :** All the rules and laws of D.C. circuit also apply to A.C. circuit containing?

**Last Answer :** All the rules and laws of D.C. circuit also apply to A.C. circuit containing resistance only.

**Description :** A parallel AC. circuit in resonance will?

**Last Answer :** A parallel AC. circuit in resonance will have a high impedance.

**Description :** In an AC. circuit, a low value of kVAR compared with kW indicates?

**Last Answer :** In an AC. circuit, a low value of kVAR compared with kW indicates high power factor.

**Description :** Explain working of static AC circuit breaker.

**Last Answer :** Static AC Circuit breaker: The circuit configuration of static AC circuit breaker using SCR is shown in the figure. When switch S' is closed, the SCRs T1 and T2 are fired in positive ... non-availability of gate current. Thus the maximum time delay for breaking the circuit is one half-cycle.

**Description :** Explain working of AC circuit breaker using SCR with circuit diagram.

**Last Answer :** AC Circuit Breaker: The circuit configuration of static AC circuit breaker using SCR is shown in the figure. When switch S' is closed, the SCRs T1 and T2 are fired in positive ... to non-availability of gate current. Thus the maximum time delay for breaking the circuit is one half-cycle.

**Description :** An AC supply of 230 V is applied to a half-wave rectifier circuit through a transformer having primary to secondary turn’s ratio 12:1. The peak inverse voltage is A) 8.62 V B) 12 V C) 19.17 V D) 27.11 V

**Last Answer :** An AC supply of 230 V is applied to a half-wave rectifier circuit through a transformer having primary to secondary turn’s ratio 12:1. The peak inverse voltage is A) 8.62 V B) 12 V C) 19.17 V D) 27.11 V

**Description :** An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be (1) unaffected (2) decreased (3) increased (4) either decreased or increased depending on the direction of the DC field

**Last Answer :** An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be either decreased or increased depending on the direction of the DC field

**Description :** Explain power in single phase AC circuit.

**Description :** What is the purpose of a capacitor in an AC circuit?

**Last Answer :** Every AC supply is not ideal AC it contains DC component so to provide restriction to DC component in supply we have to use Capacitor

**Description :** In an A.C. circuit power is dissipated in?

**Last Answer :** In an A.C. circuit power is dissipated in resistance only.

**Description :** The apparent power drawn by an A.C. circuit is 10 kVA and active power is 8 kW. The reactive power in the circuit is?

**Last Answer :** The apparent power drawn by an A.C. circuit is 10 kVA and active power is 8 kW. The reactive power in the circuit is 6 kVAR.

**Description :** The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the circuit is?

**Last Answer :** The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the circuit is 32 kW.

**Description :** Pure inductive circuit takes power from the A.C. line when?

**Last Answer :** It takes power when voltage decreases and current increases.

**Description :** In any A.C. circuit always?

**Last Answer :** In any A.C. circuit always apparent power is more than actual power.

**Description :** Application of Norton's theorem to a circuit yields?

**Last Answer :** Application of Norton's theorem to a circuit yields equivalent current source and impedance in series.

**Description :** Maximum Power Transfer Theorem 1

**Last Answer :** Maximum Power Transfer Theorem 1

**Description :** State Superposition Theorem.

**Last Answer :** Superposition Theorem: In any linear, bilateral, multisource network the voltage across or the current through any branch is given by algebraic sum of all individual voltages or currents caused ... sources acting alone with all other sources replaced by their internal resistances if any.

**Description :** State superposition theorem applied to D.C. circuits.

**Last Answer :** Superposition Theorem applied to D.C. circuits: Superposition theorem states that in any linear, bilateral, multisource network, the response (voltage across any element or current through any ... each source acting alone, while the other sources are replaced by their internal resistances.

**Description :** The superposition theorem is based on the concept of ?

**Last Answer :** The superposition theorem is based on the concept of Linearity.

**Description :** Why superposition theorem is not valid for power?

**Description :** As per Shannon’s channel capacity theorem, if samples are transmitted in ‘T’ seconds over a noisy channel which is bandlimited to ‘B’ Hz. The number of samples ‘n’ is given by (symbols/notations carry their usual meaning) A) B/T B) T/B C) 2BT D) BT/2

**Last Answer :** As per Shannon’s channel capacity theorem, if samples are transmitted in ‘T’ seconds over a noisy channel which is bandlimited to ‘B’ Hz. The number of samples ‘n’ is given by ( ... /notations carry their usual meaning) A) B/T B) T/B C) 2BT D) BT/2

**Description :** Millman's theorem yields equivalent (1) Impedance or Resistance (3) Voltage source (2) Current source (4) Voltage or Current source

**Last Answer :** Millman's theorem yields equivalent Voltage or Current source

**Description :** Which of the following statements is incorrect ? (A) Superposition theorem is useful for Linear and Non-linear circuit analysis when several sources are present in the circuit. (B) ... purely resistive, maximum power transfer is achieved under the condition : Load Resistance = Source Resistance

**Last Answer :** Which of the following statements is incorrect ? (A) Superposition theorem is useful for Linear and Non-linear circuit analysis when several sources are present in the circuit. ... purely resistive, maximum power transfer is achieved under the condition : Load Resistance = Source Resistance

**Description :** Norton’s theorem states that a complex network connected to a load can be replaced with an equivalent impedance (A) in series with a current source (B) in parallel with a voltage source (C) in series with a voltage source (D) in parallel with a current source

**Last Answer :** in parallel qith current source

**Description :** The superposition theorem requires as many circuits to be solved as there are?

**Last Answer :** The superposition theorem requires as many circuits to be solved as there are sources.

**Description :** Millman's theorem yields?

**Last Answer :** Millman's theorem yields equivalent voltage or current source.

**Description :** The superposition theorem is applicable to?

**Last Answer :** The superposition theorem is applicable to linear responses only.

**Description :** The concept on which Superposition theorem is based is?

**Last Answer :** The concept on which Superposition theorem is based is linearity.

**Description :** Superposition theorem can be applied only to circuits having?

**Last Answer :** Superposition theorem can be applied only to circuits having linear bilateral elements.

**Last Answer :** According to Lami's theorem if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two.

**Description :** A large AC generator, supplying power to an infinite bus, has a sudden short-circuit occurring at its terminals. Assuming the prime mover input and the voltage behind the transient reactance to remain constant immediately after the fault, acceleration of the generator rotor is

**Last Answer :** A large AC generator, supplying power to an infinite bus, has a sudden short-circuit occurring at its terminals. Assuming the prime mover input and the voltage behind the transient reactance ... , acceleration of the generator rotor is inversely proportional to the moment of inertia of the machine

**Description :** Explain the principle of ON-OFF control and phase control of AC voltage controller with suitable circuit and waveforms.

**Last Answer :** The integral cycle control (on-off control) and phase angle control are the two types of AC voltage controller. The principle of ON-OFF control: The on-off control is also called an integral cycle ... control. In phase control, the switch is on for some period of each cycle.