What is the SI unit of electric current?
Volt
Ohm
Ampere
Coulomb
of 10
Units of Electricity – Examples, Definition, Units, Conversion Chart
Units of Electricity – Examples, Definition, Units, Conversion Chart
eElectricity, a fundamental force in the universe, plays a pivotal role in various aspects of modern life, from powering homes and industries to enabling communication and transportation systems. Understanding and quantifying electricity require the use of standardized units that facilitate measurement, analysis, and communication in scientific and engineering contexts. These units provide a consistent framework for expressing electric quantities such as current, voltage, resistance, and power. In the field of physics, the study of electricity involves exploring the relationships between these fundamental quantities and their interactions within electrical circuits and systems. Whether it’s measuring current in amperes, voltage in volts, or resistance in ohms, units of electricity form the foundation for our understanding and utilization of this essential force.
What is Units of Electricity
SI Unit of Volume
Current (I)
- Unit: Ampere (A)
- Symbol: A
- Definition: The ampere is the base unit of electric current in the SI system. One ampere is defined as the amount of electric charge passing through a conductor per second when there is a constant current flow of one coulomb per second.
Voltage (V)
- Unit: Volt (V)
- Symbol: V
- Definition: The volt is the SI unit of electric potential difference or electromotive force. One volt is defined as the potential difference across a conductor when a current of one ampere dissipates one watt of power.
Resistance (R)
- Unit: Ohm (Ω)
- Symbol: Ω
- Definition: The ohm is the SI unit of electrical resistance. One ohm is defined as the resistance between two points of a conductor when a constant potential difference of one volt applied across these points produces a current of one ampere.
Power (P):
- Unit: Watt (W)
- Symbol: W
- Definition: The watt is the SI unit of power. One watt is defined as the rate at which work is done or energy is transferred when a current of one ampere flows across a potential difference of one volt.
CGS Unit of Pressure
Current (I)
- Unit: Statampere (statA)
- Symbol: statA
- Definition: The statampere is the unit of electric current in the CGS system. One statampere is the current that, flowing through two parallel wires one centimeter apart in a vacuum, produces a force of 1 dyne per centimeter of length between the wires.
Voltage (V)
- Unit: Statvolt (statV)
- Symbol: statV
- Definition: The statvolt is the unit of electric potential difference or electromotive force in the CGS system. One statvolt is the potential difference between two points in a vacuum that will impart one statampere of current when connected by a resistance of one statohm.
Resistance (R)
- Unit: Statohm (statΩ)
- Symbol: statΩ
- Definition: The statohm is the unit of electrical resistance in the CGS system. It is defined as the resistance in which a potential difference of one statvolt produces a current of one statampere.
Power (P)
- Unit: Erg per second (erg/s)
- Symbol: erg/s
- Definition: The erg per second, also known as the erg-second or the erg per second, is a unit of power in the CGS system. It is equivalent to one erg of energy transferred or work done per second.
List of Electricity Units
| SI Unit | Symbol |
|---|---|
| Ampere (A) | A |
| Volt (V) | V |
| Ohm (Ω) | Ω |
| Watt (W) | W |
Conversion of Electricity Units
| Quantity | Conversion | Conversion Formula | Example |
|---|---|---|---|
| Current | A (Ampere) to mA (Milliampere) | 1 A = 1000 mA | 10 A = 10,000 mA |
| mA (Milliampere) to A (Ampere) | 1 mA = 0.001 A | 10 mA = 0.01 A | |
| Voltage | V (Volt) to mV (Millivolt) | 1 V = 1000 mV | 10 V = 10,000 mV |
| mV (Millivolt) to V (Volt) | 1 mV = 0.001 V | 10 mV = 0.01 V | |
| Resistance | Ω (Ohm) to mΩ (Milliohm) | 1 Ω = 1000 mΩ | 10 Ω = 10,000 mΩ |
| mΩ (Milliohm) to Ω (Ohm) | 1 mΩ = 0.001 Ω | 10 mΩ = 0.01 Ω | |
| Power | W (Watt) to mW (Milliwatt) | 1 W = 1000 m | 10 W = 10,000 mW |
| mW (Milliwatt) to W (Watt) | 1 mW = 0.001 W | 10 mW = 0.01 W |
Current:
A (Ampere) to mA (Milliampere)
To convert from Ampere (A) to Milliampere (mA), you multiply the value in Ampere by 1000.
mA (Milliampere) to A (Ampere)
To convert from Milliampere (mA) to Ampere (A), you divide the value in Milliampere by 1000.
Voltage
V (Volt) to mV (Millivolt)
To convert from Volt (V) to Millivolt (mV), you multiply the value in Volt by 1000.
mV (Millivolt) to V (Volt)
To convert from Millivolt (mV) to Volt (V), you divide the value in Millivolt by 1000.
Resistance
Ω (Ohm) to mΩ (Milliohm)
To convert from Ohm (Ω) to Milliohm (mΩ), you multiply the value in Ohm by 1000.
mΩ (Milliohm) to Ω (Ohm)
To convert from Milliohm (mΩ) to Ohm (Ω), you divide the value in Milliohm by 1000.
Power
W (Watt) to mW (Milliwatt)
To convert from Watt (W) to Milliwatt (mW), you multiply the value in Watt by 1000.
mW (Milliwatt) to W (Watt)
To convert from Milliwatt (mW) to Watt (W), you divide the value in Milliwatt by 1000.
FAQs
What are the practical applications of understanding electricity units?
Understanding electricity units is essential for designing, analyzing, and troubleshooting electrical circuits in various fields such as engineering, electronics, and telecommunications.
How do I convert between different units of electricity (A, V, Ω, W)?
To convert between units, use conversion factors based on the relationship between the units. For example, to convert from ampere (A) to milliampere (mA), multiply the value in ampere by 1000.
What is the difference between milliunits and standard units (A, V, Ω, W)?
Milliunits are smaller units of measurement, representing one-thousandth of the corresponding standard unit. For example, 1 milliampere (mA) is equal to 0.001 ampere (A).
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Practice Test
What is the unit of electric potential difference?
Ohm
Joule
Coulomb
Volt
of 10
Which unit is used to measure electrical resistance?
Ampere
Volt
Ohm
Watt
of 10
What is the unit of capacitance?
Henry
Farad
Coulomb
Ohm
of 10
Which unit measures the inductance of an electrical circuit?
Farad
Henry
Coulomb
Ohm
of 10
What unit is used to measure energy in an electrical circuit?
Joule
Watt
Volt
Ampere
of 10
What is the unit of conductance?
Siemens
Farad
Coulomb
Henry
of 10
Which unit is used for measuring the magnetic field strength?
Tesla
Farad
Volt
Ampere
of 10
What is the unit of electric field strength?
Newton
Volt per meter
Coulomb
Joule
of 10
Which unit is used to measure the rate of flow of electric charge?
Volt
Ampere
Ohm
Joule
of 10