In multisim Before firing, the voltage from anode to the cathode isa. OVIf the gate is madeon.a. NegativeThe SCR willbiased.b. Approximately Equal to Vcc.when the anode and cathode are forward-biased, the SCR turnsb. Positivewhen the gate potential is removed and the anode/cathode are forward-a. Remain onb. Turn offWhen the SCR is off, the voltage from the anode to ground isa. Close to VCCb. Near 0The SCR will turn off when the current flowing through it drops below thevalue.

these are the questions on basic properties of a SCR

Before firing, the voltage from anode to the cathode is a. OV If the gate is made on. a. Negative The SCR will biased. b. Approximately Equal to Vcc. when the anode and cathode are forward-biased, the SCR turns a. b. Positive when the gate potential is removed and the anode/cathode are forward- a. Remain on b. Turn off When the SCR is off, the voltage from the anode to ground is Close to VCC b. Near 0 The SCR will turn off when the current flowing through it drops below the value.

Before firing, the voltage from anode to the cathode is a. OV If the gate is made on. a. Negative The SCR will biased. b. Approximately Equal to Vcc. when the anode and cathode are forward-biased, the SCR turns a. b. Positive when the gate potential is removed and the anode/cathode are forward- a. Remain on b. Turn off When the SCR is off, the voltage from the anode to ground is Close to VCC b. Near 0 The SCR will turn off when the current flowing through it drops below the value.

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter59: Motor Startup And Troubleshooting Basics

Section: Chapter Questions

Problem 12SQ: How is a solid-state diode tested? Explain.

See similar textbooks

Similar questions

3. An SCR differs from the Shockley diode because a. it has a gate terminal b. it is not a thyristor c. it does not have four layers d. it cannot be turned on and off 4. A Shockley diode turns on when the anode to cathode voltage a. exceeds 0.7 V b. exceeds the gate voltage c. exceeds the forward-breakover voltage d. exceeds the forward-blocking voltage 5. Once it is conduction, a Shockley diode can be turned off by a. reducing the current below a certain value b. disconnecting the anode voltage c. a and b d. none of these
In the circuit shown below. Determine the following a. Vs (at the secondary) b. Vout (across RL) c. Vrip (ripple votage) d. VDC e. PIV (Peak Inverse Voltage) 10:1 Output 115 V mis 60 Hz RL 2.2 k) D, 50μF- All diodes are IN4001. Tund AlMannai EENG261 Page 5/11
Calculate the current flowing through the given circuit and the voltage value at the V0 ends. (Threshold voltage = 0.3V for Germanium diodes, Threshold voltage for silicon diodes = 0.6V)
4.) In which mode will a diode generally not conduct electricity? a. Bidirectional Biased b. None of these c. Forward Biased d. Reversed Biased 5.) Consider the following schematic symbol of a semiconductor device: Which side is the Cathode? (Picture inserted down below) a. Side A b. Both side A and B c. Side B d. Neither side A or B 8.) Integrated circuits can be broken down into three basic categories. Which category does an operational amplifier (or op-amp) fall into? a. Analog b. None of these c. A combination of analog and digital d. Digital
a) Name of the Circuit? (Assume Silicon Diodes) , 4:1 D b) Find the peak input voltage to the 120 V rms diodes. R 1.0 k D2 c) Find the average output voltage? d) Find the DC current? d) Find the Peak Inverse Voltage of the diodes? e) Draw the output waveform. eetee
Problem # 4 In the circuit shown below. Determine the following a. Vs (at the secondary) b. Vout (across RL) c. Vrip (ripple votage) d. VpC e. PIV (Peak Inverse Voltage) 10:1 Dy 1ISV ms Ouiput RL 2.2 k2 D, 50 pF All diodes are IN4001. alleee
14. A thyristor that looks like two back-to-back 4 layer diodes is the a. SCR b. Triac c. SCS d. DIAC 15. A device that has an unstable negative resistance region is the a. UJT b. SCS c. TRIAC d. DIAC
0:- Consider the circuit in Figure a) What type of circuit is this? b) Find and Sketch the voltage waveform across RL, assume the diodes are practical. c) If 100uf capacitor parallel with the resistor, calculate the ripple is connected factor I O o D
Q#2 (a)For Zener diode network determine the VL ,VR ,IZ, and Pzshow in figure #1
How is Zener diode connected into a circuit? What determines the voltage at which a Zener diode break down? What considerations go into determining the power dissipation rating of a Zener diode? Draw a label the schematic symbol used to represent a Zener diode What determines the maximum Zener current of a Zener diode? What is the difference between the maximum Zener current and the reverse current for a Zener diode? What does a positive Zener voltage temperature coefficient signify? What does a negative Zener voltage temperature coefficient signify? How can a Zener diode be temperature compensated?
Power supply circuit is delivering 0.5 A and an average voltage 20 V to the load as shown in the circuit below. The ripple voltage of the half wave rectifier is 0.5 V and the diode is represented using constant voltage model. The smoothing capacitor value is equal to 220V rmsh soHz} VL-DC =20V 0.01 F 0.02 F 0.0167 F None of the above
Draw the input waveform and output waveform for the circuit given below with proper values marked in the figure. Assume D1 as germanium and D2 as silicon diodes. Input Vpp=20V, V1=5 V and V2=9 V. R DZ D1 Vin Vout v2 Maximum voltage of output waveform Minimum voltage of output waveform