State if the diodes are on or off and find the values of I and V for the circuits shown below assuming the diodes are ideal . Solve for a, b, c, and d.

You are an electrician working on an overhead crane. The crane uses a large electromagnet to pick up large metal pipes. The magnet must have a minimum of 200 VDC to operate properly. The crane has an AC source of 240 V. You are given four diodes that have a peak voltage rating of 400 V each. These diodes are to be used to form a bridge rectifier to convert the AC voltage into DC voltage. Is the voltage rating of the diodes sufficient? To the nearest volt, what will be the DC output voltage of the bridge rectifier?

A 3-phase full-wave bridge rectifier is built using six power diodes numbered 1 to 6. The phase sequence of the 3-phase source is ABC and the line to line voltage is 440 V. The line to neutral voltage of phase A has an angle of -30 degrees. The anodes of the diodes 1, 2, 3 are connected to phase A, B, and C, respectively, and the cathodes of diodes 1, 2, and 3 are connected to a common terminal that serves as the positive terminal of the rectifier's output. The cathodes of diodes 4, 5, and 6 are connected to phase A, B, and C, respectively, and the anodes of diodes 4, 5, and 6 are connected to a common terminal that serves as the negative terminal of the rectifier's output.  If diode 1 is damaged and acts as an open circuit, what would the RMS voltage be at the load?

For the diode circuit to the right 8002 a V 1002 b 40mA 0.001V' a) To the left of points a and b, find the load-line relation by expressing the current, I with voltage, V. HINT: Write KCL equation for the circuit diagram and write I in terms of V from that KCL equation. This will be your load-line equation. b) Assume the diode has the following characteristic, using the load-line relation you found in (a), determine the operating voltage, V and current, I for the circuit. ip (mA) 20 15 10 5 Vp (V) 3.0 0.5 '1.0 1.5 2.0 2.5