Q:
# What Is the Formula in Calculating EMF?

Electromotive force, or EMF, is calculated using the formula e = E / Q, where e is the EMF, E is the energy in Joules and Q is the charge. The EMF measures the potential difference between the terminals of a cell when the circuit is switched off.

Continue ReadingElectromotive force can also be calculated using the formula, e = I(R + r), where I is the current flowing in the circuit, R is the load resistance across the circuit and r is the internal resistance of the cell. When drawing the graph of terminal potential difference against current, the y-intercept is the same as the EMF.

Learn more about Physics-
Q:
## What Is the Formula for Calculating Potential Difference?

A: The formula for measuring potential difference is V=W/Q and this formula is known as Ohm's law. In this equation, V is equal to the potential difference, W... Full Answer >Filed Under: -
Q:
## What Are Some Facts About Energy?

A: In physics, energy is a system's capacity to perform work, which is force acting on an object. Energy has many forms, including kinetic or mechanical energ... Full Answer >Filed Under: -
Q:
## What Are the Advantages and Disadvantages of Friction?

A: Friction is the reason humans are able to control where they move or why objects can stay in one place, but it is also the reason we must use force and los... Full Answer >Filed Under: -
Q:
## What Are Investigatory Projects That Are Related in Physics?

A: Some potential investigatory projects that are related to physics include investigating whether repulsorlifts can be used as a method of stable, magnetic l... Full Answer >Filed Under: