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Q&A

# Posts tagged current

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22 posts
66%
+2 −0

I have a small solar panel rated for 6V/DC, 150mA. I know that those specs are under ideal circumstances, and I would like to do some measurements in different weather conditions to see what I can ...

3 answers  ·  posted 3mo ago by Keelan‭  ·  last activity 2mo ago by Olin Lathrop‭

66%
+4 −1

In this circuit below the relay circuit part is acting as an inrush current limiter, but I can't understand how it works since the current is flowing in both conditions where the relay is open or c...

1 answer  ·  posted 2mo ago by deleted user  ·  last activity 2mo ago by Olin Lathrop‭

66%
+2 −0

I've heared that arc welding is getting done with low voltage. As I know arcing requires high voltage. The how arc welding is done with about 50 volt. In my opinion I've thought we need kilovolts f...

2 answers  ·  posted 3mo ago by mohammadsdtmnd‭  ·  last activity 2mo ago by rdtsc‭

42%
+1 −2

Suppose we have this graph: How can we find the operating point (Q)?In common emitter collector we just draw a line from the vertical axis (Ic) at the point (0,VCC/RC) to the horizontal axis a...

1 answer  ·  posted 10mo ago by MissMulan‭  ·  last activity 9mo ago by Circuit fantasist‭

33%
+0 −2

I was studying the Re model of a transistor: But the Re model for 2 different configurations (common emitter and common base )turns out to be the same! I don't know why I am really confused.How...

2 answers  ·  posted 10mo ago by MissMulan‭  ·  last activity 10mo ago by LvW‭

57%
+2 −1

I have designed a graph of the current in a photoresistor related to the brightness of light which hits the photoresistor. Our professor told us that it is more correct to draw the Current/Brigh...

1 answer  ·  posted 1y ago by MissMulan‭  ·  last activity 1y ago by Olin Lathrop‭

50%
+0 −0

In this datasheet it says that the minimum resolution is 0.1uA for the 10mA range.What is this minimum resolution?Is it the sensitivity of the multimeter for the 10mA range?

1 answer  ·  posted 1y ago by MissMulan‭  ·  last activity 1y ago by dsr‭

60%
+1 −0

Can we find the internal resistance of a multimeter ,when we use the multimeter like a ampmeter, from its datasheet? I am trying to find the internal resistance of IDM 505 and I went to the datash...

2 answers  ·  posted 1y ago by MissMulan‭  ·  edited 1y ago by Canina‭

71%
+3 −0

Intro Hi everyone, I have a question about the practical use of a PTC (positive thermal coefficient) resettable fuse. I've never used one before, but I'd like to add one to a DC motor circuit to p...

1 answer  ·  posted 1y ago by cosined‭  ·  last activity 1y ago by Olin Lathrop‭

50%
+1 −1

In monostable multivibrators we use a trigger signal applied to the base of the transistor which is usually off to enter the astable region Can we instead have a pin which is connected directly ...

2 answers  ·  posted 1y ago by MissMulan‭  ·  last activity 1y ago by Circuit fantasist‭

42%
+1 −2

How to find the equation of current of the RLC circuit after the switch is moved?

1 answer  ·  posted 1y ago by MissMulan‭  ·  edited 1y ago by MissMulan‭

50%
+1 −1

Which will be the total series inductance?

2 answers  ·  posted 1y ago by MissMulan‭  ·  last activity 1y ago by Andy aka‭

28%
+0 −3

How do I find the current through the inductor and the voltage of the inductor after the switch is closed?

2 answers  ·  posted 1y ago by MissMulan‭  ·  last activity 1y ago by MissMulan‭

60%
+1 −0

How do I find the voltage of the capacitor and the current through the capacitor after the switch is closed?

1 answer  ·  posted 1y ago by MissMulan‭  ·  last activity 1y ago by MissMulan‭

66%
+2 −0

Suppose we have this circuit How do I pick a appropriate value for the resistor R1?

3 answers  ·  posted 1y ago by MissMulan‭  ·  last activity 1y ago by Olin Lathrop‭

50%
+0 −0

The current through the tunnel diode is: where $I_{f}$ is the current from the Shockley diode equation and $I_{tunnel}$ is the tunnel current. Is there an expression for the tunnel current or i...

0 answers  ·  posted 1y ago by MissMulan‭

Question diode tunnel current
25%
+0 −4

Moderator's note: This is getting ridiculous. You keep posting these drawings that are barely legible. The scribbling is bad enough, but the uncropped images are unacceptable. The image you ori...

1 answer  ·  posted 1y ago by MissMulan‭  ·  last activity 1y ago by Olin Lathrop‭

50%
+0 −0

Is this equation valid only when a JFET in saturation mode , correct? because in the ohmic region the JFET acts like a voltage controlled resistor and increase in VDS increases the resistance of th...

0 answers  ·  posted 1y ago by MissMulan‭

Question voltage current jfet
42%
+1 −2

I have a question about this circuit:(critically damped oscillation) For a critically damped oscillation for a series RLC circuit the equation of current has this form I(t)=D1te^(-at)+D2e^(-at) ...

2 answers  ·  posted 1y ago by MissMulan‭  ·  last activity 1y ago by a concerned citizen‭

60%
+1 −0

I find the current flowing through the capacitor \begin{align} I_{C_1}(t)&amp;=\dfrac{\mathrm{d}}{\mathrm{d}t}\left[V_1(t)-I_{C_1}(t)R_1\right] \\ {}&amp;= \dfrac{\mathrm{d}}{\mathrm{d}t}\left...

2 answers  ·  posted 2y ago by MissMulan‭  ·  last activity 2y ago by coquelicot‭

Question voltage current ac
50%
+1 −1

How can we find the equation of current and voltage of a capacitor circuit if the input voltage is AC without using the impedance formula Xc = -jωC?. We have for homework to find the equation of...

1 answer  ·  posted 2y ago by MissMulan‭  ·  last activity 2y ago by Olin Lathrop‭

Question voltage current ac
66%
+2 −0

I'm trying to modify a LED torch, and there is a DC-DC booster (1.5 V to 3.3 V) and after that some SOT-23 device which (I assume) keeps constant 90 mA current through LED. I know I could remove th...

2 answers  ·  posted 2y ago by Chupacabras‭  ·  edited 2y ago by Chupacabras‭

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