# What is the formula of resistance?

What is the formula of resistance? R = V ÷ I Question

3 A flows through a 240 V lamp. What is the resistance of the lamp? To calculate the resistance of an electrical component, an ammeter is used to measure the current and a voltmeter to measure the potential difference. The resistance can then be calculated using Ohm’s Law.

What are the 3 Ohm’s law formulas? Fig. 3-4: A circle diagram to help in memorizing the Ohm’s Law formulas V = IR, I = V/R, and R= V/I.

Which equation is explain Ohm’s law? Ohm’s Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit. To students of electronics, Ohm’s Law (E = IR) is as fundamentally important as Einstein’s Relativity equation (E = mc²) is to physicists. E = I x R.

What is Ohm’s law state? Ohm’s law states that the voltage across a conductor is directly proportional to the current flowing through it, provided all physical conditions and temperatures remain constant. In the equation, the constant of proportionality, R, is called Resistance and has units of ohms, with the symbol Ω.

## What is the formula of resistance? – Additional Questions

### What are the different types of Ohm’s law?

They are; I = V / R. V = IR. R = V / I.

### What is the formula of current?

The current is the ratio of the potential difference and the resistance. It is represented as (I). The current formula is given as I = V/R. The SI unit of current is Ampere (Amp).

### What is P in R pL a?

The resistivity of a wire is given by R=pL/A. Where p is the resistivity of the material, L is the length of the wire and A is the cross sectional area of the wire.

### What is the SI unit for resistance?

The SI unit of electric resistance is the ohm (Ω). 1 Ω = 1 V/A.

### What do VI and R stand for in Ohm’s law?

where I is the current through the conductor, V is the voltage measured across the conductor and R is the resistance of the conductor.

### What does P I 2r mean?

P = I 2 ⋅ R. or. P = V 2 / R. P is the electric power in watt (W). V is the voltage in volts (V).

### What is P in a circuit?

Electrical Power, ( P ) in a circuit is the rate at which energy is absorbed or produced within a circuit. A source of energy such as a voltage will produce or deliver power while the connected load absorbs it.

### What does Q mean in physics?

In physics, charge, also known as electric charge, electrical charge, or electrostatic charge and symbolized q, is a characteristic of a unit of matter that expresses the extent to which it has more or fewer electrons than protons.