600 Final Review Neiep

-20 mv - Refer to figure 3. For the inverting op amp shown, what is the output voltage? 0.3 - The voltage required to cause conduction across the junction in a germanium diode is? 0.3 seconds - What is the time constant for a circuit with 150 K ohms and 2 microfarad capacitor? (TC = R x C) 1.5 seconds - How long will it take for this capacitor to be considered fully charged? 2-50uf/300VDC capacitors in parallel - What combination of capacitors could be used to replace a 100uf/250 VDC capacitor? 2.4 A - The secondary load current of a 2300 to 120 volt transformer is 46 amperes. What is the current primary? (E = I x R) 3k ohms - A 1.5 volt 8 milliamp light emitting diode needs to be operated from a 24VDC circuit. What series resistance is required? 4 - How many rectifier diodes are required to make a full wave bridge rectifier? 4.61 henries - If a circuit has three inductors in parallel of 10, 15, and 20 henries, what is the total inductance? 4v - Refer to figure 1. The zener diode is designed to breakdown at 6VDC what is the voltage drop across R1 with a constant DC supply of 10VDC 5 seconds - What is the length of time required to charge a 500-microfarad capacitor in series with a 10K ohm resistor to the maximum applied voltage of 125 VDC? (TC = R x C) 5AD - What is the hexadecimal equivalent of 12.5 A - A string of temporary lighting has fifteen 100 watt bulbs. A 15 amp breaker is the maximum size that can be used with the 14 gauge wire used in this 120 volt circuit. What is the current? 30 rpm - An elevators motor rotates at 1200 rpm at contract speed and is geard at a ratio of 40:1. If the motor turns 40 rpm the sheave turns 1 rpm. What is the actual speed of the drive sheave in rpms