Recent content by user111_23

Actually, I'm still sort of confused. I thought I found the answer in my old topics, but that didn't help. So I would still like someone to answer these questions if it's possible. My apologies.

No sweat, I have already found my answer.

Just curious: is the voltage drop across a load an expression of how much energy that device uses? If it is, what is the difference between voltage drop and power? Power is also used to determine the energy usage of a device, right? These aren't very important questions. I've just been...

Thanks for the reply. And if it isn't too much, how would an electrical signal alone switch a transistor?

Doesn't a transistor switch need a mechanical switch? Otherwise, how does the transistor switch turn on and off? Does the switch have a "mind" of it's own?

Voltage drop is how much energy a device uses. Wattage is the rate of energy transferred into the device per unit of time. Aren't both essentially the same thing? Or am I just confused?

I'm confused about voltage divider circuits. I learned that the output voltage is larger than the input voltage when R1 is smaller than R2. Let's say R1=5Ohms and R2=10 and Vs=9V. Then Vo=6V! Why is the voltage lower? Did I do something wrong? (I used a voltage divider calculator, by the way.)...

Let me clarify: Voltage=energy available per unit charge Power=transferring of energy per unit of time If the circuit is already on, what is the importance in knowing the voltage? I'm talking about DC circuits here.

Voltage causes current. Why should I know the voltage if there is already current? You know that the current is not dangerously high, let's say, so why worry about voltage?

Lets say I have circuit with resistance 4Ohms and the current 100mA. If I use Ohm's law, I get 0.4V. Why is it important to know the voltage if there is already a current? Also, when you know the energy available per unit charge (voltage) and current, I can calculate the power. In that case...

I know power is what causes devices to function in a circuit. What role does the voltage have in a circuit?

I'm not sure if this is the right board. Gates work based on binary input, 0 and 1. But what defines "input?" Is it the presence of voltage?

I can see that...But what practical use is of knowing the force on a charge in the circuit? Doesn't seem very practical.

My question is: is the E-field around a circuit meaningful? Or is it just an effect created by the moving charges?

I would like to make it clear; I know the 1 meter wire would zap the battery. I discovered that when I was 6 years old.