Three identical transformers are used to supply power to an iodizing plant requiring \(1000\) A at \(28\) V DC through a 3-phase half wave rectifier. The transformers are connected delta-wye. What are the secondary current and voltage of each transformer?
A1042 A, 28.47 V
B1017 A, 16.44 V
C1042 A, 16.44 V
D1017 A, 28.47 V
#22📜 EE Board October 1987
In the electronic laboratory, a diode rectifier tube has a plate resistance of \(600\) ohms (assumed constant) and is connected as a half-wave rectifier to a load resistance of \(1{,}400\) ohms. The energizing supply voltage is \(440\) volts effective, \(60\) Hz alternating current. Find the rms rectified current.
A0.162 A
B0.155 A
C0.208 A
D0.311 A
#23📜 EE Board April 1997
A resistor is connected across an AC supply of \(220\) volts. The power drawn is \(1{,}000\) watts. If a diode were connected in series with the resistor, what would be the power absorbed by the resistor?
A850 W
B250 W
C750 W
D500 W
#24📜 EE Board October 1996
A circuit consists of a resistor that is connected in series with a perfect diode. When connected across a \(20\)-V battery the current measured is \(10\) A. However, when connected across a \(30\)-V battery but with reversed polarity, what would be the new current?
A15 A
BZero current
C20 A
DNone of the answered listed
#25📜 EE Board April 1997
A germanium diode, which has an offset voltage of \(0.2\) V and an incremental resistance of \(20\) ohms, is connected in series with a \(10{,}000\)-ohm resistor across a \(100\) V DC source. What is the current?
