## Circuit Lab B/C

azboy1910
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### Re: Circuit Lab B/C

Krish2007 wrote:
November 17th, 2020, 2:16 pm
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.
1) Alessandro Volta
2) It has zero offset voltage, zero output impedance, infinite bandwidth, and infinity input impedance.

===Number 3 Below===

$\frac{20 - V_1}{5} - \frac{V_1 - V_2}{10} - \frac{V_1}{10} = 0$

$\frac{V_1 - V_2}{10} + 4 - \frac{V_2}{20} = 0$

V1 = 20 V
V2 = 40 V

Krish2007
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### Re: Circuit Lab B/C

azboy1910 wrote:
November 17th, 2020, 2:43 pm
Krish2007 wrote:
November 17th, 2020, 2:16 pm
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.
1) Alessandro Volta
2) It has zero offset voltage, zero output impedance, infinite bandwidth, and infinity input impedance.

===Number 3 Below===

$\frac{20 - V_1}{5} - \frac{V_1 - V_2}{10} - \frac{V_1}{10} = 0$

$\frac{V_1 - V_2}{10} + 4 - \frac{V_2}{20} = 0$

V1 = 20 V
V2 = 40 V
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azboy1910
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### Re: Circuit Lab B/C

1. Explain briefly what a solenoid is and what it does when connected to a battery (For instance, for a resistor "opposes current," could be an answer).
2. Who invented this device?
3. Find voltage RT in the following circuit.
Last edited by azboy1910 on November 17th, 2020, 6:20 pm, edited 2 times in total.

UTF-8 U+6211 U+662F
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### Re: Circuit Lab B/C

azboy1910 wrote:
November 17th, 2020, 6:17 pm
1. Explain briefly what a solenoid is and what it does when connected to a battery (For instance, for a resistor "opposes current," could be an answer).
2. Who invented this device?
3. Find voltage RT in the following circuit.
1. A solenoid is a coil of wire designed to create a magnetic field when current is run through it. A solenoid opposes changes in current.
3. 9.62 ohms


azboy1910
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### Re: Circuit Lab B/C

UTF-8 U+6211 U+662F wrote:
November 17th, 2020, 8:46 pm
azboy1910 wrote:
November 17th, 2020, 6:17 pm
1. Explain briefly what a solenoid is and what it does when connected to a battery (For instance, for a resistor "opposes current," could be an answer).
2. Who invented this device?
3. Find voltage RT in the following circuit.
1. A solenoid is a coil of wire designed to create a magnetic field when current is run through it. A solenoid opposes changes in current.
3. 9.62 ohms

1. Correct
2. I believe Ampere invented the solenoid.
3. Correct 

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### Re: Circuit Lab B/C

Define impedance and explain what it is used for.

azboy1910
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### Re: Circuit Lab B/C

UTF-8 U+6211 U+662F wrote:
November 18th, 2020, 1:12 pm
Define impedance and explain what it is used for.
Impedance is the complete opposition of the flow of current, unlike resistance, which only slows the speed of the flow of current. It is commonly described as the "resistance to AC current." It is used in capacitors and inductors in the form of reactance, which are used in a variety of appliances, as well as numerous other applications.

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### Re: Circuit Lab B/C

azboy1910 wrote:
November 23rd, 2020, 4:29 pm
UTF-8 U+6211 U+662F wrote:
November 18th, 2020, 1:12 pm
Define impedance and explain what it is used for.
Impedance is the complete opposition of the flow of current, unlike resistance, which only slows the speed of the flow of current. It is commonly described as the "resistance to AC current." It is used in capacitors and inductors in the form of reactance, which are used in a variety of appliances, as well as numerous other applications.

azboy1910
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### Re: Circuit Lab B/C

1. Consider a parallel-plate capacitor with a capacitance of 5 mF and plate area of 30 cm, connected to a 1.5-volt battery. Calculate the energy density of the capacitor.
2. Describe what happens to an LED when it exceeds its forward current rating.
3. Find the voltage at nodes 3 and 4.

ThomasL
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### Re: Circuit Lab B/C

1. (assuming 2 sigfigs) 3.5e11 J/m^3
2. Overheats and burns up?
3. V3 = 10 V, V4 = 7.5 V

First circuit question marathon Hope that's right.

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