# Shared Flashcard Set

## Details

Electricity AS Physics
AS Physics flashcards
7
Physics
Not Applicable
06/28/2017

Term
 Define electric current
Definition
 - A flow of electric charge carriers
Term
 The Charge in terms of current flowing and time elapsed
Definition
 Q = It
Term
 Formula for the power in terms of the voltage and current
Definition
 P = VI
Term
 The formula for resistance in terms of the properties of the resistive wire
Definition
 [image]p = the resistivity of the wirel = length of wireA = cross-section area
Term
 Ohm's law
Definition
 At a constant temperature, the current in the conductor is proportional to the potential difference across the conductor- Note: V = IR is not actually a statement of Ohm's law although it derives from the law
Term
 Formula for Current in terms of A, n, v, q and what does each symbol mean
Definition
 I = AnvqA = cross section arean = number of electronsv = drift velocity of electronq = charge of electron (elementary charge)
Term
 Define potential difference
Definition
 The amount of energy per unit charge (coulomb) that is converted to other forms of energy when the current passes through a component
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