Current and Measurement Quiz

The formula for current (i) in terms of charge (q) with respect to time (t) is given by $i(t) = \rac{dq(t)},{dt}$.

If the charge is described by the function $q(t) = t^3 - 2t + 7$ coulombs, then the current (i) as a function of time (t) is given by $i(t) = \rac{dq(t)},{dt} = 3t^2 - 2$ A.

The current direction always follows the direction of positive charge flow. However, since electrons are negatively charged particles, they flow in the opposite direction, which is why current direction is in the direction opposite of negative charge flow.

<p>If both positive and negative ends of the current end together, then the current will be 0. Net charge flow is also zero net charge flow.</p> Signup and view all the answers

<p>Current density is the measure of how closely the current is packed inside a particular area. It is significant as it provides information about the concentration and distribution of current within a given area.</p> Signup and view all the answers

<p>J = A/v</p> Signup and view all the answers

<p>$i(t) = 3t^2 - 2$ A</p> Signup and view all the answers

<p>Amperes per meter squared (A/m^2)</p> Signup and view all the answers

<p>Rate of flow of charge in a conductor</p> Signup and view all the answers

<p>They are always in opposite directions</p> Signup and view all the answers