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What is the equation used to calculate the resistance current or voltage?
Wiki User
∙ 14y ago
S = Apparent Power
P = Real Power [Negative for supplied power, positive for absorbed power]
Q = Reactive Power [Positive for lagging or inductive loads, negative for leading or capactive loads]
Fp = Power Factor [Specified as lagging or leading for inductive or capacitive loads respectively]
V = Voltage
I = Current
* = (Conjugate)
< = 'At an angle of'
For DC cases:
|P| = P = V x I = V^2 / R = I^2 x R
For AC cases:
S = V x I* = |S| < arccos(Fp)
|S| = |V| x |I|
|P| = |S| x Fp
|Q| = sqrt(|S|^2 - |P|^2)
Wiki User
∙ 16y ago
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How do you calculate power loss from a resistor?
The power dissipated across a resistor, or any device for that matter, is watts, or voltage times current. If you don't know one of voltage or current, you can calculate it from Ohm's law: voltage equals resistance times current. So; if you know voltage and current, power is voltage times current; if you know voltage and resistance, watts is voltage squared divided by resistance; and if you know current and resistance, watts is current squared times resistance.
What is the equation of resistance?
Ohm's Law: Resistance in ohms is voltage in volts divided by current in amperes.
How can calculate resistance for negative dc voltage?
Resistance calculations are the same no matter what the polarity of applied voltage. R=E/I Resistance (in ohms) = Voltage (in volts) divided by Current (in amperes)
Calculate the voltage of a battery if the resistance is 80 ohms and the current is 0.5 amp?
Ohm's law: Voltage is resistance times current. 80 ohms time 0.5 amperes = 40 volts.
When resistance decreases what happens to current?
Based on the simplest Electrical Equation V = I * R,(reads: voltage equals current multiplied by resistance)then, rearranged I = V / R .As resistance decreases, current flow proportionately increases
Is current the voltage multiplied by resistance?
No. V =Voltage, I =current, and R =resistancein the simple equation: V=I*R. As well, V/I=R, and. V/R=Iso Current is voltage divided by resistance
How do you calculate power loss from a resistor?
The power dissipated across a resistor, or any device for that matter, is watts, or voltage times current. If you don't know one of voltage or current, you can calculate it from Ohm's law: voltage equals resistance times current. So; if you know voltage and current, power is voltage times current; if you know voltage and resistance, watts is voltage squared divided by resistance; and if you know current and resistance, watts is current squared times resistance.
What equation relates power to current and resistance?
Power = (current) times (voltage)Current = (Power) divided by (voltage)Voltage = (Power) divided by (current)
What does the size of a current depend upon?
One way to determine current is to measure it, with an ammeter. Another way is to calculate it using Ohm's law: current = voltage / resistance.
What is the amperage in an electric circuit when the voltage 120 volts and the resistance is 40 ohms?
Ohm's Law states Voltage = Current x Resistance. You rewrite the equation as Current = Volts / Resistance to solve for current.
Can you calculate power by multiplying voltage and current?
Not enough information. Power = current x voltage. Since voltage can be anything, there is no way to calculate power. Time is irrelevant; though once you have the power, it can help you calculate energy (energy = power x time).
What is the equation of resistance?
Ohm's Law: Resistance in ohms is voltage in volts divided by current in amperes.
What the equation of resistance?
Ohm's Law: Resistance in ohms is voltage in volts divided by current in amperes.
What is the mathematical equation to find electric current?
Ohm's law is the basic answer. Voltage = Current * Resistance is ohms law. In order to find current divide voltage by Resistance V/R=I where I is current.
How do you verify omh's law using multi tester?
if your looking for current (I) = voltage ./. resistance voltage (v) = current x resistance resistance (r) = voltage ./. current plug in your values calculate them then use meter to see if they match!
What is a relationship among voltage current and resistance in a circuit?
Voltage = (current) x (resistance) Current = (voltage)/(resistance) Resistance = (voltage)/(current)
What is the relationship among voltage current and resistance in a circuit?
Voltage = (current) x (resistance) Current = (voltage)/(resistance) Resistance = (voltage)/(current)
