Question

The figure below shows an AC source, a transformer with a turns ratio of N₁/N₂ = 2.40, a source resistor R_S,and a load resistor R_L.

A circuit contains an AC source, two resistors, and a transformer composed of two coils. The transformer will bridge two halves of an otherwise disjoint circuit. The left half of the circuit starts on the left at the AC source labeled ΔV_S, goes up and to the right to a resistor labeled R_S, goes down and to the right to the transformer, and goes to the left to the other end of the AC source. The transformer coil on the left half of the circuit is labeled N₁, and the coil on the right half is labeled N₂. The right half of the circuit starts at one end of the coil N₂, goes through the resistor labeled R_L, and reaches the other end of the coil N₂.

A voltmeter across the load resistor measures an rms voltage of 26.0 V when the load resistor R_L is 54.0 Ω and the rms source voltage is

ΔV_S = 85.0 V.

(a)Determine the value of the source resistor R_s (in Ω).

Answer must be in Ω

(b)What If? If the turns ratio is increased to 3.00, determine the source resistance (in Ω) required to deliver the same amount of power to the load.

Answer must be in Ω

6) An AC source operating at a frequency of 200 Hz has a maximum output voltage of 3.00 V. What is the smallest inductor that can be connected across the source and the rms current remain less than 1.30 mA? (Enter the inductance in H.)

Answer must be in H

Answer 1

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