9. The three terminals of an SCR are a. E,B,C b. A,K c. A,K,G d. MT1,MT,G 10. When an SCR is turned on, the anode to cathode voltage is approximately a. 6 V b. 0.7 V c. 0 V d. none of these
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- What is CEMF?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 5/11For the circuit in the figure, let V input = 8V, Ri = 12ohms, RL = 10ohms, and VZ = 3.3V. Determine the voltages and currents of the resistors and the current of the zener diode.
- In RL load connected (without free transition diode), single phase, uncontrolled, full wave rectifier (4 diodes), the source voltage is sinusoidal and its effective value is 44Volt, 50 Hz. The ohmic load value connected to the circuit is 10 ohms. Average value of load current calculate. (L>>R) a) 4.16 A b) 3.46 A C) 3.26A d) 4.56 A e) 3.96 AProblem # 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. alleeeConsider the circuit shown in the figure below with Ry=13 ko and R=9 kO. The Zener diode voltage is Vz = 3.5 V, then the currents Iz and , respectively, are equal to: R1 ww 20 V O a. 1.280 mA, 0.789 mA O b. 0.680 mA, 0.189 mA O c. 0.880 mA 0.389 mA O d. 1.080 mA, 0.589 mA
- For the circuit shown in Figure, consider Ideal diodes. If Vs = 19sin wt, Vb = 4 V, the minimum value of output voltage is: Vout at of estion Vs Vb Oa. -4 V Ob. -15 V Oc. -19 V Od. 4 V3. 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 theseFor the circuit shown in the Figure, if the diodes are silicon diodes with VD(on)=0.7 V, and VIn=50 sin wt V, V1 =7 V and V2 =13 V, then the value of VOUT (p-p) is: R1 D, D2 VIN VOUT vi E v2= Ca. 19.4 V Ob. 17.4 V Cc. 15.4 V Cd. 21.4 V
- 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)V, is a 60Hz source with a peak voltage VP-120V is feeding a rectifier, assume ideal diode. The load resistance has a value of R= 10 k0. If ripple voltage Vr = 2V, the Diode average current Ipavg is VI Select one: a. + e. None Ob. 580mA Oc. 850mA Od 245mA 425mA D C: www tu Vo Q65) The figure below illustrates a simple voltage threshold detection circuit. To understand how it operates, we will analyze its behavior based on the simple constant voltage drop model for both diodes. Assume the Zener diode (Z1) only conducts when its breakdown voltage of 10V is reached. Di is a red light emitting diode (LED). Assume it conducts after its forward bias voltage of 1.8V is reached. Vin is unknown. Assume Zj acts as a perfect Zener diode (without series resistance). What voltage does Vin have to reach before there is a current through R¡? What voltage must Vin reach before current flows through R2? Write an equation for the current through Zi in terms of Vin, Rị and R2 that is valid when Vin is high enough for both diodes to be conducting. a. b. c. R2 Vino R1 LED