Lorentz method is a method of absolute measurement of resistance.

Explanation:
The Lorentz method is a technique used to measure the resistance of a conductor by utilizing the phenomenon of the Lorentz force. The Lorentz force is the force experienced by a charged particle when it moves through a magnetic field. In the Lorentz method, a known current is passed through the conductor, and the Lorentz force acting on it is measured.

Here is a detailed explanation of the Lorentz method:

1. Principle:
The Lorentz force experienced by a conductor carrying a current can be expressed as F = BIL, where F is the force, B is the magnetic field strength, I is the current, and L is the length of the conductor.
The force is perpendicular to both the current direction and the magnetic field direction.

2. Experimental Setup:
To measure the resistance using the Lorentz method, the following setup is required:
- A conductor of known length and cross-sectional area.
- A magnetic field source, such as a permanent magnet or an electromagnet.
- A current source to pass a known current through the conductor.
- A balance system to measure the force exerted on the conductor.

3. Procedure:
The conductor is placed in the magnetic field perpendicular to both the current direction and the magnetic field direction. The current is passed through the conductor, and the balance system measures the force exerted on the conductor due to the Lorentz force.
The force is balanced by adjusting another force (such as gravitational force) until equilibrium is achieved. The balancing force is then measured.

4. Calculation:
Using the measured force and the known values of current, magnetic field strength, length, and cross-sectional area of the conductor, the resistance can be calculated using the formula R = (F/BIL).

Advantages of the Lorentz Method:
- The Lorentz method allows for the absolute measurement of resistance.
- It does not require any comparison with standard resistors.
- It can be used to measure the resistance of conductors with different shapes and materials.

In conclusion, the Lorentz method is a technique that utilizes the Lorentz force to measure the resistance of a conductor. It provides an absolute measurement of resistance and does not require the use of standard resistors for comparison.