Current, voltage and resistance can be measured using a multimeter
electric current with water flow.
Imagine a system of plumbing pipes through which water flows. Some sort of force
has to drive the water, such as a water pump, which is analogous to a voltage source.
Imagine that one section of the pipes has a much smaller diameter than the rest of
the system. That section exhibits much higher resistance to the water flow.
So, for the water current to pass at the same speed, more force is required. The same
happens with electric circuits.
because they are the foundation of everything that happens in your circuit.
If you don’t like math, don’t worry.
These are very straight forward formulas and we’ll show you how to use them with
practical
by Ohm’s Law.
The relationship is very simple; the voltage drop on a resistive component is
proportional to its resistance and the current flowing through it.
𝑉 = 𝐼 × 𝑅
It is measured in watts (W) and can be calculated as follows:
𝑃 = 𝑉 × I
- Current is measured in amperes or Amps (A)
- Voltage is measured in Volts (V)
- Resistance is measured in Ohms (Ω)
The Water Analogy
For most people is much easier to understand electric concepts when comparingelectric current with water flow.
Imagine a system of plumbing pipes through which water flows. Some sort of force
has to drive the water, such as a water pump, which is analogous to a voltage source.
Imagine that one section of the pipes has a much smaller diameter than the rest of
the system. That section exhibits much higher resistance to the water flow.
So, for the water current to pass at the same speed, more force is required. The same
happens with electric circuits.
Ohm’s Law and Electric Power:
When working with electronics there are two equations that you can’t ignore,because they are the foundation of everything that happens in your circuit.
If you don’t like math, don’t worry.
These are very straight forward formulas and we’ll show you how to use them with
practical
Ohm’s Law
There is a relationship between current, voltage and resistance, which is representedby Ohm’s Law.
The relationship is very simple; the voltage drop on a resistive component is
proportional to its resistance and the current flowing through it.
𝑉 = 𝐼 × 𝑅
- V = Voltage in volts (V)
- I = Current in amps (A)
- R = Resistance in ohms (Ω)
Electric Power:
The power is the amount of energy that your circuit consumes per second.It is measured in watts (W) and can be calculated as follows:
𝑃 = 𝑉 × I
- P = Power in watts (W)
- V = Voltage in volts (V)
- I = Current in amps (A)