Which of the terms in your formula do you think the clectric field can influence? While tracking the speed of individual particles is great, a more useful and simpler quantity to measure is current which is the amount of charges moving through some cross-sectional area per unit time. It has units of Coufombs per second (or Amps} and is abbreviated by the symbot i. See if you can write out a formula for the current through a section of wire with cross sectional area A given the average speed of particles v, the charge on each particle, q, and the number of charges per unit volume, n. Use dimensional analysis for this formula.

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Magnetic Force

A magnetic force arises when a charged particle or a current-carrying conductor is placed in a magnetic field. It is created because of the movement of the charged particles.