# For AC networks, as per maximum power transfer theorem, for maximum power transfer, the source

15 views
For AC networks, as per maximum power transfer theorem, for maximum power transfer, the source impedance should be equal to: A) twice the load impedance B) complex conjugate of load impedance C) twice the complex conjugate of load impedance D) none of these

–1 vote
Load impedance must be complex conjugate of source impedance

For AC networks, as per maximum power transfer theorem, for maximum power transfer, the source impedance should be equal to: complex conjugate of load impedance

## Related questions

State maximum power transfer theorem for DC circuit.

For maximum transfer of power, internal resistance of the source should be?

Maximum Power Transfer Theorem 1

In order to get maximum power transfer from a capacitive source, the load must? A.have a capacitive reactance equal to circuit resistance B.have an impedance that is the complex conjugate of the source impedance C.be as capacitive as it is inductive D.none of the above

For high efficiency of transfer of power, internal resistance of the source should be?

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

An 800 kV transmission line has a maximum power transfer capacity of P. If it is operated at 400 kV with the series reactance unchanged, the new maximum power transfer capacity is approximately (A) P (B) 2P (C) P / 2 (D) P / 4

In an alternator at lagging power factor the generated voltage per phase as compared to that at unity power factor?

When a source is delivering maximum power to a load, the efficiency of the circuit is always (a) 50% (b) 75% (c) 100% (d) Depends on the circuit parameters

Give the criteria for selection of distribution transformer as per IS:10028 (part-I) 1985.

The color of wire recommended for earth connection as per BIS code is

How many characters per sec (7 bits + 1 parity) can be transmitted over a 2400 bps line if the transfer is synchronous (1 start bit and 1 stop bit)?  A) 300 B) 240 C) 250 D) 275

An independent voltage source in series with an impedance ZS=R+jXS delivers a maximum average power to a load impedance ZL when A) ZL = R B) ZL = jXS C) ZL = R-jXS D) ZL = R+jXS

A single-phase ac voltage source has 200 V rms and a system connected consumes an active power of 300 W. What is the reactive power consumed by the system if 2.5 A rms current is drawn ?  (a) 100 VAR (b) 200 VAR (c) 300 VAR (d) 400 VAR

Two two-port networks are connected in cascade. The combination is to be represented as a single two-port network. The parameters of the network are obtained by multiplying the individual a. z-parameter matrix b. h-parameter matrix c. y-parameter matrix d. ABCD-parameter matrix

As per Electricity Act, ____________means any line which is used for carrying electricity for any purpose.  (A) Electric line (B) Transmission line (C) All of the above (D) None of the above

A single phase CSI has capacitor C as the load. For a constant source current, the voltage across the capacitor is   (A) square wave (B) triangular wave (C) step function (D) pulsed wave

For a transient stability analysis, as long as equal area criterion is satisfied, the maximum angle to which rotor angle can oscillate is:  (A) 0˚ to 20˚ (B) 45˚ to 50˚ (C) Greater than 90˚ (D) 65˚ to 85˚

Why superposition theorem is not valid for power?

Can we apply the superposition theorem to AC circuit?

An iron cored inductance coil can be modelled, over a normal operating range of networks ,as A) non-Linear bilateral element B) linear bilateral element C) linear time varying element D) non-linear time invariant element

For a balanced three phase star connected load for which line voltage is 230V and per phase resistance and reactance is 6 Ohm and 8 Ohm respectively. Calculate: 1) phase voltage 2) line current 3) power factor 4) total power absorbed

What is the maximum value of a load which consume 500 KWh per day at a load factor of 0.40, if the consumer increases the load factor of 0.50 without increasing the maximum demand?

For a series R -C circuit, the power factor corresponding to maximum power is (a) 0-5 lag (b) 0.5 lead (c) 0.707 lag (d) 0-707 lead

The maximum power in a synchronous motor (for a given excitation) is produced when the power angle is equal to: (A) 0° (B) 45° (C) 60° (D) 90°

For very low speed and high power applications the best suited ac motor is:

What is the symbol for AC power?

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

Can you apply Thevenin's theorem in an AC circuit?

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

In dc choppers per unit ripple is maximum when duty cycle is   (a) 0.2 (b) 0.5 (c) 0.7 (d) 0.9

Give the specification of three phase transformer as per IS 1180(Part-1) 1989.

Gauge factor of strain gauge is defined as the ratio of per unit change in the ______.

The number of processes completed per unit time is known as ____________. (A) output (B) throughput (C) efficiency (D) capacity

The number of processes completed per unit time is known as __________.  (1) Output (2) Throughput (3) Efficiency (4) Capacity

For rural electrification in a country like India with complex networks, it is preferable to use: A) Air circuit breaker B) Oil circuit breaker C) Vacuum circuit breaker D) Minimum oil circuit breaker

For large networks, which topology is used  (1) Bus (2) Star (3) Ring (4) Mesh

In practice, a current source inverter consists of an AC/ DC converter with a large inductance ‘L’ in the output. This inductance maintains a ……… …………through the switching devices over short interval of time. A) constant current B) constant voltage C) constant power D) none of the (A), (B), (C)

An R-L series AC circuit has R = 10 ohm and XL = 10 ohm. It is connected to an AC voltage source, the phase angle between voltage and current is (a) 30° (b) 45° (c) 60° (d) 36.8°

The transient current in lossless L-C circuit when excited from an AC source is, sine wave  (a) Critically damped (b) Underdamped (c) Overdamped (d) Undamped

The primary coil of a transformer is connected to a 60 V ac source. The secondary coil is connected to a 330 ohms load. The turns ratio is 3:1. What is the secondary voltage? A.2 V B.20 V C.180 V D.18 V

A large dc motor is required to control the speed of the blower from a 3 -phase ac source. The suitable ac to dc converter is, 3 -phase (a) Fully controlled bridge converter (b) Fully controlled bridge converter with freewheeling diode (c) Half controlled bridge converter (d) Converter pair in sequence control

The two basic components of a Thevenin equivalent ac circuit are the equivalent voltage source and the equivalent: A. Series impedance B. Series resistance C. Parallel impedance D. Parallel resistance