Mega Ohm bridge method is used for removing the leakage current from bridges.

Explanation:
The Mega Ohm bridge method is a technique used to eliminate the effect of leakage currents in bridge circuits. Leakage currents can cause errors in the measurement and affect the accuracy of the bridge circuit. The Mega Ohm bridge method helps in minimizing or eliminating these errors.

Here is a detailed explanation of the Mega Ohm bridge method:

1. Introduction to leakage current:
Leakage current refers to the small currents that flow through insulation materials or components due to their imperfect insulating properties. It can occur in various electronic devices and circuits, including bridge circuits.

2. Importance of accurate measurement:
In bridge circuits, accurate measurement is essential for obtaining precise values of resistance, capacitance, and inductance. Leakage currents can introduce errors in these measurements and affect the overall performance of the circuit.

3. Mega Ohm bridge method:
The Mega Ohm bridge method involves the use of high resistance values in the bridge circuit to minimize the effect of leakage currents. By using resistors with values in the megaohm range, the leakage currents become negligible compared to the other currents in the circuit.

4. Implementation of the Mega Ohm bridge method:
To implement the Mega Ohm bridge method, the resistors in the bridge circuit are chosen to have high resistance values. These resistors act as shunt paths for the leakage currents, diverting them away from the measurement path.

5. Benefits of the Mega Ohm bridge method:
By using the Mega Ohm bridge method, the accuracy of the bridge circuit is greatly improved. The effect of leakage currents is minimized, allowing for more precise measurements of resistance, capacitance, and inductance.

6. Limitations of the Mega Ohm bridge method:
While the Mega Ohm bridge method is effective in reducing leakage currents, it may introduce other sources of errors such as thermal noise and drift. Careful selection of components and proper calibration is necessary to mitigate these effects.

In conclusion, the Mega Ohm bridge method is used for removing the leakage current from bridges. It involves the use of high resistance values in the bridge circuit to minimize the effect of leakage currents and improve the accuracy of measurements.