what is the formula for find resistance?
18070
If you know the total current and the voltage across the whole circuit, you can find the total resistance using Ohm's Law: R = V / I. For example, a parallel circuit has a voltage of 9 volts and total current of 3 amps. The total resistance RT = 9 volts / 3 amps = 3 Ω.
225219
The 12 most important Formulas: Voltage V = I × R = P / I = √(P × R) in volts V Current I = V / R = P / V = √(P / R) in amperes A. Resistance R = V / I = P / I2 = V2 / P in ohms Ω Power P = V × I = R × I2 = V2 / R in watts W.
1183080
Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). Ohms are named after Georg Simon Ohm (1784-1854), a German physicist who studied the relationship between voltage, current and resistance.
1186727
Use the Ohm's law formula: Power (watts) = Voltage (volts) x I current (amps). Arrange the equation for three-phase power to solve the current (amps): Current (amps) = power (watts) ÷ voltage (volts) ÷ square root of 3 (1.732) ÷ power factor; I = P ÷ (V_1. 732_p.
471148
To calculate voltage across a resistor in a series circuit, start by adding together all of the resistance values in the circuit. Then, divide the voltage across the circuit by the total resistance to find the current.
1396600
Use these values in Ohm's Law. If you know the total current and the voltage across the whole circuit, you can find the total resistance using Ohm's Law: R = V / I.
522950
What will be the percentage change in the resistance of the wire? Here, change in length is very small, so by using formula, dRR×100 = 2(dll×100), the percentage change in Resistance will be 2×1 = 2%.
1236288
The current flowing through a resistor at a constant temperature is directly proportional to the potential difference across it. This is called Ohm's law. When resistors are connected in series, the total resistance of two or more resistors is the sum of their individual resistance.
20308
The relationship between current, voltage and resistance is expressed by Ohm's Law. This states that the current flowing in a circuit is directly proportional to the applied voltage and inversely proportional to the resistance of the circuit, provided the temperature remains constant.
44616
The relationship between Potential Difference, Resistance, and Current is given by Ohm's Law, which states that: The potential difference (voltage) across an ideal conductor is proportional to the current through it. The constant of proportionality is called the "resistance", R.
430913
['The type of material of which the resistor is made.', 'The length of the resistor.', 'The thickness of the resistor.', 'The temperature of the conductor.']
440133
First, we use Ohm's law ( V = I × R ), to find the current through the resistor. The voltage across the resistor is V = 9 V. The resistance of the resistor is R = 100 ?. Then, we can use the power rule ( P = I × V ), to find the power dissipated by the resistor.
1170105
['RT = R1 + R2 + R3.', '2 + 2 + 3 = 7 Ohms.', 'R total is 7 Ohms.']
87826
The proportionality constant from ohm's law. Load resistance is also a resistance, but it has a very specific meaning in the context of electric circuits; it is the resistance connected between the output stage of a circuit, and the ground. This resistance draws in the power supplied from the circuit.
1193319
To calculate the total overall resistance of a number of resistors connected in this way you add up the individual resistances. This is done using the following formula: Rtotal = R1 + R2 +R3 and so on. Example: To calculate the total resistance for these three resistors in series.
552938
All resistance are connected in series combination so Total resistance is equal to summation of all resistance. Total resistance = 6 ohm. Now potential difference across 3 ohm resistor, V = IR. so Potential difference across 3 ohm resistor V = 3*1/3 = 1 Volt.
685711
You need to know the overall potential difference across the resistor and the two resistor value which are in series. ... If the two resistor in series are r1 and r2 and potential difference across the two is V, then Vr1 = V * r1 / (r1+r2).