10 Questions
What is the formula for current (i) in terms of charge (q) with respect to time (t)?
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, what is the current (i) as a function of time (t)?
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.
Explain the relationship between current direction and the direction of positive charge flow.
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.
Under what conditions will the current be zero?
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.
Define current density and explain its significance.
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.
What is the formula for current density?
J = A/v
If the charge is described by the function $q(t) = t^3 - 2t + 7$ coulombs, what is the current (i) as a function of time (t)?
$i(t) = 3t^2 - 2$ A
What is the unit of current density?
Amperes per meter squared (A/m^2)
What does current density measure?
Rate of flow of charge in a conductor
What is the relationship between current direction and the direction of positive charge flow?
They are always in opposite directions
Test your knowledge of current and its measurement in this quiz. Learn about the rate of flow of charge in a conductor, amperes as the unit of measurement, and the relationship between charge and time.
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