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Calculate Electromotive Force (EMF) easily with our EMF Calculator. Get quick, step-by-step solutions for your physics and electrical needs.
Electromotive force (EMF) is the energy a power source gives to each unit of charge. It pushes electrons through a circuit, helping electrical devices work. Batteries and generators create EMF. The unit of measurement is volts (V).
The basic formula for EMF is:
EMF (ε) = V + I × r
Where:
A battery has a terminal voltage of 10V. It has an internal resistance of 2Ω and supplies 3A of current. What’s the EMF?
ε = 10V + (3A × 2Ω)
ε = 10V + 6V
ε = 16V
So, the EMF is 16V.
There are different ways to generate EMF:
Using our Electromotive Force Calculator is simple:
You experience EMF daily. Your phone battery uses it. Cars start with it. Even your home’s power supply depends on it. Without EMF, no electronic device would work!
Our Electromotive Force Calculator makes EMF calculations fast and easy. Whether you’re a student or an engineer, this tool helps you get accurate results. Try it now and see how simple it is!
Use the formula: EMF = V + Ir or use our calculator.
Yes. In magnetic fields, it can oppose motion.
EMF is the total energy per charge. Voltage is the potential difference.
With a voltmeter in an open circuit.