Friday, 6 July 2018

How to Measure DC Current Using a Multimeter Effectively


How to Measure a D.C Current With a Multimeter. 

This is a video on how to do this below for better understanding.

Measuring DC current without special designed devices meant for it can be quite frustrating . We know how some of us might have tried to measure DC current from a bad power supply in order to be able to tell if it is working or not but with no luck.

This post is going to be teaching you how to measure DC current using a multimeter.

Before we begin,  lets quickly recap the definition of voltage and current using ohms law. From Ohms law, voltage in a closed circuit can simply be defined as the product of the current and resistance in the circuit while current in a closed  circuit can be defined as the amount of voltage in a circuit divided by the total resistance offered by that circuit.

What this simply means is that the voltage at the output can simply be measured by a multimeter by connecting its leads to the positive and negative terminal of the outputs.

For current, doing the above will simply either blow the fuse of the multimeter or destroy the multimeter completely. This happens because connecting the terminals to the output to measure the DC current is shorting the circuit.

To avoid shorting, a load is connected to the circuit and the multimeter is then connected in series with the load before turning the knob on the multimeter to measure DC current and then turn on the circuit to take your reading.

Please if you have any questions, feel free to leave them in comments box below the post.

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