## Circuit Lab B/C

UTF-8 U+6211 U+662F
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Joined: January 18th, 2015, 7:42 am
Division: C
State: PA

### Re: Circuit Lab B/C

Write the voltage drop equations for a capacitor and a resistor.
$V_C = \frac{Q}{C}$

$V_R = IR$

Jacobi
Exalted Member
Posts: 137
Joined: September 4th, 2018, 7:47 am

### Re: Circuit Lab B/C

Write the voltage drop equations for a capacitor and a resistor.
$V_C = \frac{Q}{C}$

$V_R = IR$
Awesome! You next.

Jacobi
Exalted Member
Posts: 137
Joined: September 4th, 2018, 7:47 am

### Re: Circuit Lab B/C

Write the voltage drop equations for a capacitor and a resistor.
$V_C = \frac{Q}{C}$

$V_R = IR$
Awesome! You next.

UTF-8 U+6211 U+662F
Exalted Member
Posts: 1518
Joined: January 18th, 2015, 7:42 am
Division: C
State: PA

### Re: Circuit Lab B/C

Write the voltage drop equations for a capacitor and a resistor.
$V_C = \frac{Q}{C}$

$V_R = IR$
Awesome! You next.
All right!

Describe the behavior of an RC circuit which is a) charging and b) discharging.

Jacobi
Exalted Member
Posts: 137
Joined: September 4th, 2018, 7:47 am

### Re: Circuit Lab B/C

All right!

Describe the behavior of an RC circuit which is a) charging and b) discharging.
a) The voltage through the resistor starts high and decays exponentially as the capacitor becomes saturated.  The charged capacitor has an extremely high voltage drop.
b) The voltage through the resistor starts high and decays exponentially as the capacitor discharges.  The capacitor acts as a voltage source in the absence of other sources.

UTF-8 U+6211 U+662F
Exalted Member
Posts: 1518
Joined: January 18th, 2015, 7:42 am
Division: C
State: PA

### Re: Circuit Lab B/C

All right!

Describe the behavior of an RC circuit which is a) charging and b) discharging.
a) The voltage through the resistor starts high and decays exponentially as the capacitor becomes saturated.  The charged capacitor has an extremely high voltage drop.
b) The voltage through the resistor starts high and decays exponentially as the capacitor discharges.  The capacitor acts as a voltage source in the absence of other sources.

Jacobi
Exalted Member
Posts: 137
Joined: September 4th, 2018, 7:47 am

### Re: Circuit Lab B/C

Do current and voltage sources exist in real circuits?

UTF-8 U+6211 U+662F
Exalted Member
Posts: 1518
Joined: January 18th, 2015, 7:42 am
Division: C
State: PA

### Re: Circuit Lab B/C

Do current and voltage sources exist in real circuits?
Not ideal ones but they can be approximated; however, real-life sources have a limited amount of charge (which can be measured in ampere-hours) and have internal resistance that sometimes needs to be accounted for.

Jacobi
Exalted Member
Posts: 137
Joined: September 4th, 2018, 7:47 am

### Re: Circuit Lab B/C

Do current and voltage sources exist in real circuits?
Not ideal ones but they can be approximated; however, real-life sources have a limited amount of charge (which can be measured in ampere-hours) and have internal resistance that sometimes needs to be accounted for.

UTF-8 U+6211 U+662F
Exalted Member
Posts: 1518
Joined: January 18th, 2015, 7:42 am
Division: C
State: PA

### Re: Circuit Lab B/C

What is doping in the context of PN junctions and why is it done?