What is the difference between electromotive force and potential difference?
The electromotive force and the potential difference in a circuit are very similar concepts as they are both names for energy per unit charge within a circuit and they both use the same unit, Volts. The difference between the two is that the electromotive force is the voltage, the energy per unit charge, provided by an electrical source, while the potential difference is simply the difference in voltage between two points within the circuit.
CL
Related Physics A Level answers
All answers ▸Asteroid of mass 10^16 kg is travelling in the equatorial plane of Earth. It hits the surface at 45°. After the impact the day shortens by 1% (15 mins). How fast was the asteroid - comment? Neglect effects of atmosphere. Consider only inelastic collision.
A projectile is fired at an angle of 30 degrees from the horizontal, it reaches a maximum height of 12m above the ground before coming to rest 600m from its initial starting point at the same level. What is the initial speed of the projectile?
What is the photo-electric effect and what impact did it have on the development of Quantum Mechanics?
How do capacitors work and what are its units?