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  • What is the difference between electric potential, potential difference . . .
    Voltage is the difference in potential between two arbitrary points at which the potential is not necessarily zero For example, the potential at point A relative to a defined reference point (sometimes an infinite distance away) might be 10000 volts, and the potential at point B might be 10100 volts Then the voltage between B and A is 100 volts
  • What creates voltage? What causes electrons to move in a wire?
    I tried googling a bit, but I don't understand modern physics enough to narrow my search down What part of the Standard Model, Relativity, or any other modern physics theory describe voltage? What creates voltage? What causes electrons to move in a wire?
  • electrostatics - Is voltage electric potential or electric potential . . .
    The voltage is defined for every voltage source (battery, charged capacitor) and then added according to the circuit laws for the element (whether in series, parallel etc) Then the total potential difference across the circuit (the voltage) is the sum of these individual voltages
  • Difference between current and voltage sources
    A voltage source is assumed to deliver energy with a specific terminal voltage which does not depend upon the current from the source A current source on the other hand is assumed to deliver energy with a specified current through the terminals Both current and voltage sources are ideal In practice, we represent a real voltage source as an ideal voltage source in series with a resistance
  • electricity - What is the relationship between AC frequency, volts . . .
    In an alternating current, how are frequency, voltage, amperage, and watts related? For instance, imagining the power as a sine wave, what is amperage if voltage is the amplitude? Is there a better
  • Why is voltage equal across the resistors connected in parallel?
    1 This isn't a physics question, it's a question of definitions Voltage in a circuit is measured between two nodes "In parallel," by definition, means that the resistors all are connected between the same two nodes When you measure the Voltage across any one of the resistors, you are by definition, measuring the Voltage between the same two
  • I dont understand what we really mean by voltage drop
    Here we are speaking of voltage in the context of Ohm's law: current resistance Of course, in this sense, voltage makes sense at any two points, and since resistance can vary at various points along the circuit, so clearly voltage can vary at different points along the circuit
  • electric circuits - What is the sign of voltage if I move from the . . .
    The arrow that represents voltage is very clearly drawn as a pushing force from - to + Sign conventions: I only found passive and active sign conventions Both talk about what is considered positive for current Current in or out But it does not talk about tension Actually, it represents tension in both cases going from $-$ to $+$
  • How does increasing voltage or current affect the power?
    Power (P) = Voltage (V) * Current (I) That law describes the relationship between power, voltage, and current in a conductor It means that, if you measure the current flowing in the conductor, and you measure the voltage difference from one end of the conductor to the other at the same instant, then the product of voltage and current will be the rate at which heat is generated in the
  • Why do we use negative sign for electric potential voltage?
    Negative sign is used for electric potential belonging to negative charge but whenever in electrostatics the quot;negative quot; sign is referencing for example: force means its attractive or repu





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