Homework Answers
(6) A blue LED with a forward voltage drop of 3.5V is to be energized from a 12 volt battery. To light the blue LED to ful brightness requires a current of 20 mA through the LED. The blue LED has a p...
(6) A blue LED with a forward voltage drop of 3.5V is to be energized from a 12 volt battery. To light the blue LED to ful brightness requires a current of 20 mA through the LED. The blue LED has a peak inverse voltage rating of 5 V. i) Draw the circuit dingram of the arrangement you will use to light the LED to full brightness. (ii What is the value of the resistor you will use in your...
This is one original diagram for you to see what kind of circuit we have: Draw out the circuit d...
This is one original diagram for you to see what kind of circuit
we have:
Draw out the circuit diagrams for these
tasks.
Each task is a separate task and you will need to construct a
specific circuit for each task, as well as indicate where the
measurement is taking place.
1. Specific Voltage
From a 5V power supply, have a drop of 3.3V over a specific
resistor accurate to the 0.1V mark. (Please point out which
specific resistor if...
3. To maintain IR exposure, how much? (1 point) if KCR is increased by 15%, what change(s) should be made and by 4....
3. To maintain IR exposure, how much? (1 point) if KCR is increased by 15%, what change(s) should be made and by 4. To maintain IR exposure, ifXpls decreased by 15%, what change(s) should be made and by how much? (1 point) An image was made using 75 kVp and 12 mAs to produce optimal IR exposure. What new set of exposure factors would produce the same IR exposure but with a 15%ncrease in kVp? (1 point) 5.
3. To...
(a) Explain what would happen if the gate is made positive with respect to the cathode during rev...
(a) Explain what would happen if the gate is made positive with respect to the cathode during reverse blocking of a thyristor (no diagram required) [15%] (b) Draw a well labelled plot showing the variation of the anode voltage versus anode current of a thyristor (no graph paper, explanation or circuit diagram needed) [20 %] (c) Consider the circuit diagram shown below. Here V is the DC source voltage and the initial charge of the capacitor C is q(0)-0 ....
"O OHLEI E PICS! 3. An RC-Circuit is made up of a 12 kO resistor, a...
"O OHLEI E PICS! 3. An RC-Circuit is made up of a 12 kO resistor, a 40 uF capacitor and a 9.0 V battery. The battery is used to charge the capacitor, and then it is removed from the circuit through the use of a switch, allowing the capacitor to discharge. a. (3 pts.) What is the time constant of the circuit? b. 17 pts.) Calculate the voltage across the capacitor, voltage across the resistor, and the current in the...
PHYS 421 Inductance Problem Session 6 - 12 V 4) In the circuit shown, the switch...
PHYS 421 Inductance Problem Session 6 - 12 V 4) In the circuit shown, the switch has been in position a for a long time. At time t=0, the switch switch is moved to position b. a) What is the current in the circuit just before the switch is moved? Explain. b) Beginning with the loop rule for voltage, L-10H derive an expression for the current as a no function of time after the switch has been moved. Symbols only-in...
In the circuit shown in Figure 6(b), an emf source E = 12 V and resistance...
In the circuit shown in Figure 6(b), an emf source E = 12 V and resistance r = 0.3.2 is connected to two resistors R1 = 1.52 and R2 = 1.212. Two capacitors C1 = 0.05 uF and C2 = 0.02 uF are connected in parallel to the resistors, and switch S is open. ię RB + + RB Figure 6(b) Calculate the current in the circuit and the charges Q1, Q2 on the capacitors after a long time. ANS:...
6. LED Alarm Circuit One day, you come back to your dorm to find that your...
6. LED Alarm Circuit One day, you come back to your dorm to find that your favorite candy has been stolen. Determined to catch the perpetrator red-handed, you decide to put the candy inside a kitchen drawer. Using the following circuit design, you would like to turn on a light-emitting diode (LED) "alarm" if the kitchen drawer is opened. Rli LED 2.5V LED Note Rphoto is a photoresistor, which acts like a typical resistor but changes resistance based on the...
For a RC circuit if C- 1uF and the DC source voltage is 12 V, design...
For a RC circuit if C- 1uF and the DC source voltage is 12 V, design the resistor R such that the capacitor voltage reaches 10v 15 sec after the switch is closed ? What is the time constant of the resulting circuit? (5 pts) Switch S E, 9 b) How does the capacitive reactance of a 1 micro-farad capacitor and the inductive reactance of a 10 milli-henry inductor change in a AC circuit when the frequency changes from 50...
4 A 8 A V- 12 59. Given Ri > R2, what is the relationship between V1 and V2? d. No conclusion can be made Given R1 > R2, what is the relationship between I, and 12? b 11 12 c. 1, >12 d....
4 A 8 A V- 12 59. Given Ri > R2, what is the relationship between V1 and V2? d. No conclusion can be made Given R1 > R2, what is the relationship between I, and 12? b 11 12 c. 1, >12 d. No conclusion can be made Which of the following is a valid equation? b. 12 11-4A 121 d 12 12A-1 e 12 11-12A
4 A 8 A V- 12 59. Given Ri > R2, what is...
(6) A blue LED with a forward voltage drop of 3.5V is to be energized from a 12 volt battery. To light the blue LED to ful brightness requires a current of 20 mA through the LED. The blue LED has a peak inverse voltage rating of 5 V. i) Draw the circuit dingram of the arrangement you will use to light the LED to full brightness. (ii What is the value of the resistor you will use in your...
This is one original diagram for you to see what kind of circuit
we have:
Draw out the circuit diagrams for these
tasks.
Each task is a separate task and you will need to construct a
specific circuit for each task, as well as indicate where the
measurement is taking place.
1. Specific Voltage
From a 5V power supply, have a drop of 3.3V over a specific
resistor accurate to the 0.1V mark. (Please point out which
specific resistor if...
3. To maintain IR exposure, how much? (1 point) if KCR is increased by 15%, what change(s) should be made and by 4. To maintain IR exposure, ifXpls decreased by 15%, what change(s) should be made and by how much? (1 point) An image was made using 75 kVp and 12 mAs to produce optimal IR exposure. What new set of exposure factors would produce the same IR exposure but with a 15%ncrease in kVp? (1 point) 5.
3. To...
(a) Explain what would happen if the gate is made positive with respect to the cathode during reverse blocking of a thyristor (no diagram required) [15%] (b) Draw a well labelled plot showing the variation of the anode voltage versus anode current of a thyristor (no graph paper, explanation or circuit diagram needed) [20 %] (c) Consider the circuit diagram shown below. Here V is the DC source voltage and the initial charge of the capacitor C is q(0)-0 ....
"O OHLEI E PICS! 3. An RC-Circuit is made up of a 12 kO resistor, a 40 uF capacitor and a 9.0 V battery. The battery is used to charge the capacitor, and then it is removed from the circuit through the use of a switch, allowing the capacitor to discharge. a. (3 pts.) What is the time constant of the circuit? b. 17 pts.) Calculate the voltage across the capacitor, voltage across the resistor, and the current in the...
PHYS 421 Inductance Problem Session 6 - 12 V 4) In the circuit shown, the switch has been in position a for a long time. At time t=0, the switch switch is moved to position b. a) What is the current in the circuit just before the switch is moved? Explain. b) Beginning with the loop rule for voltage, L-10H derive an expression for the current as a no function of time after the switch has been moved. Symbols only-in...
In the circuit shown in Figure 6(b), an emf source E = 12 V and resistance r = 0.3.2 is connected to two resistors R1 = 1.52 and R2 = 1.212. Two capacitors C1 = 0.05 uF and C2 = 0.02 uF are connected in parallel to the resistors, and switch S is open. ię RB + + RB Figure 6(b) Calculate the current in the circuit and the charges Q1, Q2 on the capacitors after a long time. ANS:...
6. LED Alarm Circuit One day, you come back to your dorm to find that your favorite candy has been stolen. Determined to catch the perpetrator red-handed, you decide to put the candy inside a kitchen drawer. Using the following circuit design, you would like to turn on a light-emitting diode (LED) "alarm" if the kitchen drawer is opened. Rli LED 2.5V LED Note Rphoto is a photoresistor, which acts like a typical resistor but changes resistance based on the...
For a RC circuit if C- 1uF and the DC source voltage is 12 V, design the resistor R such that the capacitor voltage reaches 10v 15 sec after the switch is closed ? What is the time constant of the resulting circuit? (5 pts) Switch S E, 9 b) How does the capacitive reactance of a 1 micro-farad capacitor and the inductive reactance of a 10 milli-henry inductor change in a AC circuit when the frequency changes from 50...
4 A 8 A V- 12 59. Given Ri > R2, what is the relationship between V1 and V2? d. No conclusion can be made Given R1 > R2, what is the relationship between I, and 12? b 11 12 c. 1, >12 d. No conclusion can be made Which of the following is a valid equation? b. 12 11-4A 121 d 12 12A-1 e 12 11-12A
4 A 8 A V- 12 59. Given Ri > R2, what is...
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