What's the difference between Potential Difference and Electromotive Force
Although both are measured in volts, there is a subtle difference in their respective definition. Electromotive Force is the transfer of chemical energy in a battery (multiple single cells) into electrical energy per unit charge. Potential Difference is the transfer of electrical energy to other forms per unit charge, like kinetic in a motor or to hear in a heating element.
Both can be worked out numerically by computing V=W/Q
JJ
Related Physics A Level answers
All answers ▸You have a layer of glass with a refractive index of 1.5 and the glass is surrounded by air. A light ray shines into the glass and Total Internal Reflection occurs at the glass-air boundary. What is the critical angle?
A 4 metre long bar rotates freely around a central pivot. 3 forces act upon it: 7N down, 2m to the left of the pivot; 8N up, 1m to the left of the pivot; 4N up, 1m to the right of the pivot. Apply one additional force to place the bar in equilibrium.
Explain how and why the diffraction pattern of electrons passing through a slit depends on their momentum.
Why does the Photoelectric Effect lead to the conclusion that classical physics cannot be all of physics?