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Updated on 12th May, 2023 , 4 min read
Coulomb is the unit of electric charge. Since matter has an electric charge, when it is exposed to an electromagnetic field, the material feels a pull. Electric charge causes objects to be either drawn to or repulsed by one another. The two types of costs are positive and negative charges. The amount of charge moving through a particular area at a particular moment is known as the electric charge.
Protons repel protons, whereas electrons draw them. Like how protons draw electrons but repel electrons. The forces exerting pressure on a charge are closely linked to its nature. A proton and an electron have the same amount of charge, or 1.6 x 10-19 C. However, the charge of a proton is positive, while the charge of an electron is negative.
The SI unit of electric charge is the Coulomb, represented by C. A charge of one coulomb is defined as one ampere of current flowing for one second across a unit cross-sectional area. The charge of a particle is essentially the sum of the charges of all of its electrons. It can be modeled as:
q = ne
where q = charge,
n = number of electrons,
and e = charge on 1 electron = 1.6 x 10-19 C
Furthermore, the CGS unit of electric charge is a composite of three fundamental quantities: mass, length, and time.
Other units that are used to measure electric charge include the following -
Unit Name |
Unit Symbol |
abCoulomb |
abC |
statCoulomb |
statC |
franklin |
f |
electron |
e |
planck_Charge |
planck |
The formula for calculating electric charge is:
I.t = q
Here,
Electric charge has the following properties:
The table below has the important units used to measure electrical properties:
Electrical Properties |
Unit |
Symbol |
Capacitance |
Farad |
C |
Charge |
Coulomb |
Q |
Conductance |
Siemen |
G |
Frequency |
Hertz |
Hz |
Impedance |
Ohm |
Z |
Inductance |
Henry |
H or L |
Power |
Watts |
W |
Voltage |
Volt |
V |
Resistance |
Ohm |
R |
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By - Nikita Parmar 2024-09-06 10:59:22 , 6 min readThe SI unit of electric charge is Coulomb (C).
One Coulomb of electric charge is defined as the amount of charge that flows through a conductor when a current of one ampere flows for one second.
One Coulomb of electric charge is equivalent to the charge of approximately 6.24 x 10^18 electrons.
Coulombs and amps are related by the equation Q = It, where Q is the electric charge in Coulombs, I is the current in amps, and t is the time in seconds.
The charge of one proton is approximately 1.6 x 10^-19 Coulombs.
Electric charge can be measured in smaller units such as microCoulombs (μC) or nanoCoulombs (nC).
The symbol for electric charge is Q.
Electric charge is a scalar quantity, meaning it has magnitude but no direction.
Yes, electric charge can be negative. In fact, negative charge is carried by electrons, while positive charge is carried by protons.
Electric charge is related to electric force through Coulomb’s law, which states that the force between two charged objects is proportional to the product of their charges and inversely proportional to the square of the distance between them.