<h3>Compton scattering, discovered by Arthur Holly Compton, is the scattering of a photon after an interaction with a charged particle, usually an electron. If it results in a decrease in energy of the photon, it is called the Compton effect. Part of the energy of the photon is transferred to the recoiling electron.</h3>
12 V is the f.e.m. of the battery. The potential difference that is applied to the motor is actually the fem minus the voltage drop on the internal resistance r: this is equal to the voltage drop on the resistance of the motor R: so we can write: and using and we can find the current I: