Meter bridge and Ohm's law are both methods used to measure resistance. However, a meter bridge is considered to be more accurate than Ohm's law. In this response, we will explain why.


Ohm's law states that the current flowing through a conductor is directly proportional to the potential difference applied across it, provided the temperature and other physical conditions remain constant. Mathematically, Ohm's law can be expressed as V=IR, where V is the potential difference, I is the current and R is the resistance.


A meter bridge is a device used to measure the resistance of a conductor. It consists of a long wire, which is divided into two parts by a gap. A resistance wire is connected between the two ends of the gap, and a jockey is used to slide along the wire to measure the resistance.


There are several advantages of using a meter bridge over Ohm's law to measure resistance:

• Accuracy: A meter bridge is more accurate than Ohm's law because it directly measures the resistance of the conductor, whereas Ohm's law calculates the resistance indirectly based on the current and potential difference.


• Eliminates errors: A meter bridge eliminates errors that may occur during the measurement of current and potential difference, such as errors due to the internal resistance of the ammeter and voltmeter.


• Direct measurement: A meter bridge directly measures the resistance of the conductor, which means that it does not require any assumptions about the properties of the conductor, such as its temperature and physical conditions.


• Low cost: A meter bridge is relatively low-cost and easy to construct, making it accessible to students and researchers.

In conclusion, a meter bridge is considered to be more accurate than Ohm's law in measuring resistance due to its direct measurement of resistance and elimination of errors that may occur during the measurement of current and potential difference. Additionally, a meter bridge is relatively low-cost and easy to construct, making it accessible to students and researchers.