How does impedance transformation in an AC circuit enhance power transfer?
In AC circuits, impedance transformation (using transformers or matching networks) is used to match the load impedance to the source impedance.
According to the maximum power transfer theorem:
• Maximum power is delivered when
(load impedance equals the complex conjugate of source impedance).
Impedance transformation helps achieve this condition, thereby enhancing power transfer.
Power loss and voltage drop respectively, in the 2Ω resistor is
What is the unit of magnetizing force?
Which among the options is voltage source equivalent of the practical current source shown below?
A copper wire is stretched so that its length is increased by 0.2%. What is the percentage change in the resistance?
Which of the following colour has wavelength between green and orange?
A star connected resistive network with 20Ω in each phase is supplied with a three-phase ac source of 400 V. What is the total power consumed in the circuit?
What is the magnetic field strength required to produce a flux density of 1mWb/m² in air?
Two inductive coils which are close to each other have a mutual inductance of 0.6 H. Current through one coil is increased from 1 A to 6 A in 0.03 s. The voltage induced in the other coil is:
Voltage and current in a single- phase ac circuit are given by (50+j20) V and (20+j50) A respectively. What is the active power consumed in the circuit?
An 8 kW single phase load at power factor of 0.8 leading is supplied from a single- phase ac supply. Reactive power drawn from the source is:
Power loss and voltage drop respectively, in the 2Ω resistor is
What is the unit of magnetizing force?
Which among the options is voltage source equivalent of the practical current source shown below?
A copper wire is stretched so that its length is increased by 0.2%. What is the percentage change in the resistance?
Which of the following colour has wavelength between green and orange?
A star connected resistive network with 20Ω in each phase is supplied with a three-phase ac source of 400 V. What is the total power consumed in the circuit?
What is the magnetic field strength required to produce a flux density of 1mWb/m² in air?
Two inductive coils which are close to each other have a mutual inductance of 0.6 H. Current through one coil is increased from 1 A to 6 A in 0.03 s. The voltage induced in the other coil is:
Voltage and current in a single- phase ac circuit are given by (50+j20) V and (20+j50) A respectively. What is the active power consumed in the circuit?
An 8 kW single phase load at power factor of 0.8 leading is supplied from a single- phase ac supply. Reactive power drawn from the source is:
