You need to use the formula E = IR + Ir
where: E is the e.m.f. of the power supply (the theoretical maximum voltage across the terminals when no current is flowing)
I is current
R is resistance of the circuit (load resistance)
and r is the internal resistance of the power supply.
Therefore, you can rearrange this formula to give r:
E = IR + Ir (Subtract IR)
E-IR=Ir (divide by I)
(E-IR)/I=r or r=(E-IR)/I
Resistance is resistance , no matter if it is contact resistance or any other resistance. And formula is R = V / I.
To calculate the resistance for a slip ring motor, there is an equation that must be solved. This is Torque = S/R. S is the slip of the motor and R is the resistance of the motor.
The resistance force multiplied by the resistance distance.
-- Connect a source of known, small voltage across the ends of the unknown resistance. -- Measure the resulting current through the unknown resistance. -- Divide (small known voltage)/(measured current). The quotient is the formerly unknown resistance.
what is the diference betwean calculated and maesured value
There's nothing to calculate. Until it fails and must be replaced, the resistance ofa capacitor is infinite. A measurement with a typical ohmmeter will show that thecapacitor is open.
YOu screw it all the way to hell.
Need more information please.
If the wire length is 100m and the Diameter is 1mm calculate the Resistance of wire?
To find resistance from a graph of voltage vs. current, you can calculate the slope of the graph. Resistance is equal to the slope, so you can divide the voltage by the current to determine the resistance. The unit of resistance is ohms (Ω).
yes, calculate it from temperature coefficient of resistance.
Use Ohm's Law. In this case, multiply the resistance by the current.