Resisitive load

A 4:1 step down transformer uses a 60Vac source on the primary windings. There is 120mA flowing through the load resisitance on the secondary windings. What is the resisitive load? Is it 125 ohms? 15V/.120=125

What is the output horsepower? Efficiency?

If a fully loaded 440V, three-phase motor draws 12.4 A at 86% power factor (pf). It's speed is 1730 rpm and its torque output to a mechanical load is 29.1 lb-ft x 1.356 = 39.5 Nm. What is the output horsepower? Efficiency?

Bode Plot

How would I sketch a bode plot for the following transfer function: V2/V1=20jf/10,000/(1+jf/10,000)(1+jf/1,000,000)

RL Circuits: Growth and decay of current in inductor

See attached circuit. Note current source is 2A,Resistors are 2 Ohms, Inductor 2H. Assume that the switch has been open for a long time and that it closes at t=0 sec. The switch remains closed thereafter. How do I solve for Vx(t) and Ix(t)?

Magnitude of Impedience

See attached dwg. Can you please show me how to find the magnitude of Z (The impedience "looking in") as a function of frequency from 10Hz to 100KHZ? Note the inductor is 1mH the resistor 100 Ohms and the cap 1uF.

Transformer circuit

See attached dwg (note in the center of the circuit is a transformer-ignore L1 AND L2 in the middle of the transformer, I put 2 inductors and 2 lines to simulate a transformer). Can you show me how to find Ix and Iy? The 10V is AC NOT DC. The resistors are 7 ohms and 4 Ohms. Thanks.

Three phase delta circuit

A 2400V balanced, three phase delta circuit (see attached) has phase load impedances of 40+j60 OHMS. What are IaA, IbB, and IcC? Note: That just as the current IaA shown on the attached, is the current flowing from node a to node A, the current IbB is the current flowing from node b to node B, and the current IcC is the curr ...continues

Logic expression

See attached. I got this wrong on a quiz. What is the expression for the output, C? I say it was C=A XOR B Am I wrong?

Finding voltage and current.

See attached. My question is Vbg 3V or -3V.Is I2 1A or -1A?

Circuit current and voltages

Please see attached. By evaluating this circuit I find Vx=2.5V and I1=.75A and I2=.25A am I correct? Note R1=20 R2=10 R3=10 CURRENT SOURCE=1A DC VOLTAGE=10V