I worded q1 badly, I really meant "square, 1 cm to a side", but as "1 cm^2" your answer is right. 2 is right, and I was looking for an actual time (in seconds) for 3.azboy1910 wrote: ↑November 4th, 2020, 9:21 amCreationist127 wrote: ↑November 4th, 2020, 7:24 am 1. A capacitor has 1 cm^2 plates, .5 mm apart from each other (with nothing in between). What is its capacitance?
2. A resistor is a cylinder with 5 mm diameter and is 1 cm long, and has resistivity 1 Ω*m. What is its resistance?
3. The resistor and capacitor are placed in series with each other and a 9-volt battery. How long will it take for the capacitor to charge to 8.5 volts?1. 1.77E(-10) F or 0.177 nF 2. 509.3 ohms 3. about 2.89 time constants
Circuit Lab B/C
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Re: Circuit Lab B/C
2018: Hovercraft, Thermo, Coaster, Solar System
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Re: Circuit Lab B/C
My bad, I misread that the same resistor and capacitor from questions 1 and 2 were used for question 3, I thought that they were separate. Sorry about that!Creationist127 wrote: ↑November 5th, 2020, 9:20 amI worded q1 badly, I really meant "square, 1 cm to a side", but as "1 cm^2" your answer is right. 2 is right, and I was looking for an actual time (in seconds) for 3.azboy1910 wrote: ↑November 4th, 2020, 9:21 amCreationist127 wrote: ↑November 4th, 2020, 7:24 am 1. A capacitor has 1 cm^2 plates, .5 mm apart from each other (with nothing in between). What is its capacitance?
2. A resistor is a cylinder with 5 mm diameter and is 1 cm long, and has resistivity 1 Ω*m. What is its resistance?
3. The resistor and capacitor are placed in series with each other and a 9-volt battery. How long will it take for the capacitor to charge to 8.5 volts?1. 1.77E(-10) F or 0.177 nF 2. 509.3 ohms 3. about 2.89 time constants
Edit: Anyway I believe the answer then would be
about 2.605E(-7) seconds
Last edited by azboy1910 on November 5th, 2020, 12:17 pm, edited 1 time in total.
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Re: Circuit Lab B/C
Looks good, your turn!azboy1910 wrote: ↑November 5th, 2020, 9:31 amMy bad, I misread that the same resistor and capacitor from questions 1 and 2 were used for question 3, I thought that they were separate. Sorry about that!Creationist127 wrote: ↑November 5th, 2020, 9:20 amI worded q1 badly, I really meant "square, 1 cm to a side", but as "1 cm^2" your answer is right. 2 is right, and I was looking for an actual time (in seconds) for 3.
Edit: Anyway I believe the answer then would beabout 2.605E(-7) seconds
2018: Hovercraft, Thermo, Coaster, Solar System
2019: Thermo, Circuit Lab, Sounds, Wright Stuff
2020: Circuit Lab, Wright Stuff, Machines
2021: Circuit Lab, Machines, WIDI, anything but Wright Stuff
Can I request that we delete 2020 from our memories and do it over again?
2019: Thermo, Circuit Lab, Sounds, Wright Stuff
2020: Circuit Lab, Wright Stuff, Machines
2021: Circuit Lab, Machines, WIDI, anything but Wright Stuff
Can I request that we delete 2020 from our memories and do it over again?
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Re: Circuit Lab B/C
1. Draw a Thevenin equivalent circuit for the circuit below using R5 as the load resistor.
2. An electromagnet with a turn density of 1.5k turns/meter with a current of 50 mA passing through it has a nickel core (100 H/m). Calculate the magnetic field strength of the electromagnet.
3. Two wires are made of the same material and are of the same length. However, one of the wires (W1) has double the diameter than the other wire (W2). Assuming all other factors that would affect the resistance of these wires are the same for both wires, how many times greater is the resistance of W2 than W1?
2. An electromagnet with a turn density of 1.5k turns/meter with a current of 50 mA passing through it has a nickel core (100 H/m). Calculate the magnetic field strength of the electromagnet.
3. Two wires are made of the same material and are of the same length. However, one of the wires (W1) has double the diameter than the other wire (W2). Assuming all other factors that would affect the resistance of these wires are the same for both wires, how many times greater is the resistance of W2 than W1?
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Re: Circuit Lab B/C
azboy1910 wrote: ↑November 7th, 2020, 6:36 pm 1. Draw a Thevenin equivalent circuit for the circuit below using R5 as the load resistor.
2. An electromagnet with a turn density of 1.5k turns/meter with a current of 50 mA passing through it has a nickel core (100 H/m). Calculate the magnetic field strength of the electromagnet.
3. Two wires are made of the same material and are of the same length. However, one of the wires (W1) has double the diameter than the other wire (W2). Assuming all other factors that would affect the resistance of these wires are the same for both wires, how many times greater is the resistance of W2 than W1?
1. 0.5 V battery in series with the load and a 3.38 ohm resistor? 2. 7500 T? 3. W2 is 4x the resistance of W1.
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Re: Circuit Lab B/C
UTF-8 U+6211 U+662F wrote: ↑November 8th, 2020, 6:55 pmazboy1910 wrote: ↑November 7th, 2020, 6:36 pm 1. Draw a Thevenin equivalent circuit for the circuit below using R5 as the load resistor.
2. An electromagnet with a turn density of 1.5k turns/meter with a current of 50 mA passing through it has a nickel core (100 H/m). Calculate the magnetic field strength of the electromagnet.
3. Two wires are made of the same material and are of the same length. However, one of the wires (W1) has double the diameter than the other wire (W2). Assuming all other factors that would affect the resistance of these wires are the same for both wires, how many times greater is the resistance of W2 than W1?1. 0.5 V battery in series with the load and a 3.38 ohm resistor? 2. 7500 T? 3. W2 is 4x the resistance of W1.
Ok, so here's what I got. 1. I got a 0.88 V battery in series with the load and a 3.06-ohm resistor. 2. I got 0.0094 T as an answer from the equation below: (1500 turns/m)(50 mA/1000)(100 H/m)(4pi x 10^-7 H/m) = 0.0094 T 3. Correct Let me know if you disagree. If not, your turn!
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Re: Circuit Lab B/C
azboy1910 wrote: ↑November 9th, 2020, 9:37 amUTF-8 U+6211 U+662F wrote: ↑November 8th, 2020, 6:55 pmazboy1910 wrote: ↑November 7th, 2020, 6:36 pm 1. Draw a Thevenin equivalent circuit for the circuit below using R5 as the load resistor.
2. An electromagnet with a turn density of 1.5k turns/meter with a current of 50 mA passing through it has a nickel core (100 H/m). Calculate the magnetic field strength of the electromagnet.
3. Two wires are made of the same material and are of the same length. However, one of the wires (W1) has double the diameter than the other wire (W2). Assuming all other factors that would affect the resistance of these wires are the same for both wires, how many times greater is the resistance of W2 than W1?1. 0.5 V battery in series with the load and a 3.38 ohm resistor? 2. 7500 T? 3. W2 is 4x the resistance of W1.Ok, so here's what I got. 1. I got a 0.88 V battery in series with the load and a 3.06-ohm resistor. 2. I got 0.0094 T as an answer from the equation below: (1500 turns/m)(50 mA/1000)(100 H/m)(4pi x 10^-7 H/m) = 0.0094 T 3. Correct Let me know if you disagree. If not, your turn!
1. I broke the circuit at the battery instead of shorting it out. I am now getting 3.06 ohms. Also for the voltage, I forgot to remove R5, I am now getting the same answer as you. 2. The magnetic field is permeability times turns per length times current, so I believe it would be (1500 turns/m)(0.05 A)(100 H/m) = 7500 T. I believe your equation doesn't work out dimensionally because you multiplied by an extra H/m instead of replacing the permeability of free space with the permeability of nickel.
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Re: Circuit Lab B/C
UTF-8 U+6211 U+662F wrote: ↑November 9th, 2020, 9:21 pm Next question: What is a relay and how does it work?
A relay is an electrically controlled switch, kind of like a transistor. It can work in multiple ways, but one way (the most common way?) is for it to use an electromagnet. The electromagnet controls the switch by moving a conductor into position to close the switch and allow current flow.
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Re: Circuit Lab B/C
Yep, your turn!Krish2007 wrote: ↑November 17th, 2020, 8:46 amUTF-8 U+6211 U+662F wrote: ↑November 9th, 2020, 9:21 pm Next question: What is a relay and how does it work?A relay is an electrically controlled switch, kind of like a transistor. It can work in multiple ways, but one way (the most common way?) is for it to use an electromagnet. The electromagnet controls the switch by moving a conductor into position to close the switch and allow current flow.
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Re: Circuit Lab B/C
1) Which of the famous scientists in the rules found that electricity could be produced chemically?
2) List 4 properties of an ideal op-amp.
3)
Find V1 and V2.
2) List 4 properties of an ideal op-amp.
3)
Find V1 and V2.
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