What is the unit of measure for resistance?
Answer (2)
The SI unit of resistance is the ohm symbol 'Ω' ;
The unit of measure for resistance is the ohm, symbolized by the Greek letter Ω (omega).
What is Resistance?
Resistance is a property of a material or an electrical component that opposes the flow of electric current. It determines how much the material resists the flow of electrons.
Why is Resistance Important?
Resistance plays a crucial role in electrical circuits. It helps in controlling and limiting the amount of current flowing through the circuit, which is important for ensuring that electronic devices operate safely and efficiently.
How is Resistance Measured?
Resistance is measured using an instrument called an ohmmeter. This device applies a small voltage to a resistor and measures the current flowing through it, allowing the resistance to be calculated using Ohm's Law.
Ohm's Law
Ohm's Law relates the voltage (V), current (I), and resistance (R) in an electrical circuit. It is given by the formula:
V = I ⋅ R
Where:
V is the voltage in volts,
I is the current in amperes, and
R is the resistance in ohms.
Understanding resistance and its unit, the ohm, is essential for studying and working with electronic circuits.
