Hello, friends, I hope you all are doing great. In today’s tutorial, we will discuss the Difference Between EMF and Voltage. The basic difference between EMF and voltage is that EMF is energy given to the charge and voltage is the energy needed for the movement of one unit charge from one point to another.
In today’s post, we will have a detailed look at both EMF and voltage with a detailed compare them to find their differences. So let’s get started with the Difference Between EMF and Voltage.
Difference Between EMF and Voltage
What is EMF
- The energy provided to the one coulomb of charge is called EMF.
- its measuring units is volts.
- Its formula is E=I(R+r). In this equation, R is the outer resistance and r is the inner resistance of the circuitry
- The device that produces the EMF is called a transducer. it is such a module that transforms any type of energy into electrical energy.
- In case of having a loop created through conductive material then force given on charges in the path to move on make emf.
- The module that has 2 terminals emf value can get from these points
- The electromotive generation instruments examples are solar, photodiode cells, battery
- The magnetic fields also make emf.
- Its mechanical expression is ε=w/q
Formula for EMF
E = V + Ir
Here,
E is the electromotive force
V is voltage
I is current
r is the internal resistance
What is Voltage
- Voltage is the energy required by the charge to move from one location to another.
- Its formula is V=IR. and define J/C here J is joule and C is columb
- Its symbolic representation is V. Its other units are millivolts, kilovolts,
- Voltmeter used to find its value
- Volts help to find electromotive force and potential difference
- Volts is generated through an electrical field
- The value of voltage can be found between two points.
- The source that generates voltage is electric and magnetic fields.
Formula for Voltage
V = IR
Here,
V is the voltage
I is the current
R is the resistance
Comparison Between Voltage and EMF
Voltage
- It is denoted with V
- Voltage is the potential difference between two points that helps to current flow. It is energy per unit charge when moving between two points.
- V = IR is the basic formula for voltage
- It works for moving charge from one point to another.
- Sources of voltage are the Electric field and magnetic field.
- Its intensity is less than EMF and not constant.
- The voltage value is based on circuit resistance.
- it is Non-Coulomb force operation.
- it is the effect of EMF.
- Voltage is measured between two points and the measuring device is a voltmeter.
EMF
- it is denoted with E or ε
- It is an energy force that gives charge through a battery cell. It produces a voltage in active battery sources and energy provided in a column of charge
- It maintains the potential difference between two electrodes.
- its equation is E = I(R + r) or E = W/Q.
- External sources operated in moving charge from one to another point.
- It is produced through active devices like batteries, solar cells, and transformer generators.
- It has constant intensity.
- Its value is not based on circuit resistance.
- Due to emf voltatge produces.
Faqs
Is EMF always voltage?
- In low resistance, circuit emf and voltatge will be equal since all energy given by the source will used by charges. In real world, some energy is lost due to resistance which means voltage is less than EMF
Does higher voltage mean higher EMF?
- The electric field is produced through voltage difference, higher voltage means a strong field is produced. magnetic fields are produced when current flows, a higher current produces a strong field.
How does emf work?
- The EMF is produced when electrons or charged particles move. Charged particles in motion state generated fields. Electric and magentic fields exist in the circuit, causing AC or DC currents.
Why is voltage less than EMF?
- When the current flows in the circuit then there is voltage losses due to internal resistance. So V is less as compared to V. it is also seen from this equation V=E-Ir.
What causes higher voltage?
- High voltage surges can come in different types that can be internal and external to the power system, like faults, capacitor switching, lightning strikes, switching operations, and harmonics.
- Lightning strikes can induce high current and voltage in transformer, and other connected components.
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So friends that is a complete post about the difference between EMF and voltage if you have any questions ask in the comments. Thanks for reading, Have a good day.
