Voltage
To understand what electronics is,
you need to know first, what is voltage. All we know that if there is no
Voltage, electronics is non sense. Yet,
we know all about this, if not , this article can help you.
Let
us say I have a battery in my hand. Does the battery have voltage? Yes, it has.
The batteries have voltage between its terminals. This voltage helps the
Current to flow through any electrical circuit placed across it. If there is a
current flow into the circuit, you will see some happenings like a bulb produce
light, you can create heat, sound, movement, magnetism, sparks and etc.
How to Test the
Voltage
In able to test the voltage or
the amount of voltage, we need a Voltmeter or the Multitester. Take note that the unit used for voltage is
“Volts” named after Voltaire, the man who introduce voltage in the human
history. Multitester or Voltmeter can help you to figure out how big or small
is the amount of voltage. The bigger the voltage, yet, the bigger the current
flows into the circuit. Let us get back
to the battery. We can see that there indicators, the Positive (+) and the
Negativ (-). Those are what we called the polarity. In using Multitester for
testing the voltage of the battery, set your point to DC (Direct Current)
section. This tester is having two
wirings colored Red and Black (Most of All). The Red indicates the positive and
the Black indicates the negative. To begin the test, put the Red wire with pin
into the positive part of the battery and Black on the negative part. You can
see that the metter indicator on the
Tester move from left to right, it means that there is voltage and if the meter don’t move a bit, it means that
there is no flow of current. Shown below is the picture of testing the voltage
of a battery.
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