# Shared Flashcard Set

## Details

Physics Ch. 6 - Circuits
MCAT
10
Physics
03/31/2016

Term
 current
Definition
 the amount of charge Q passing through the conductor per unit time Δt.   I = Q/Δt   expressed in amperes (1A = 1C/s)
Term
 Kirchhoff's Junction Rule
Definition
 the sum of currents directed into a point equals the sum of currents directed away from that point
Term
 Kirchhoff's loop rule
Definition
 Around any closed circuit loop, the sum of voltage sources will alway be equal to the sum of voltage (potential) drops
Term
 Ohm's Law
Definition
 V = IR V is the voltage drop I is the current  R is the magnitude of the resistance
Term
 power
Definition
 the rate at which energy is dissipated by a resistor is the power of the resistor   P = IV = I2R = V2/R
Term
 Resistors in series
Definition
 The total resistance of the circuit can be found by adding the individual resistances together
Term
 resistors in parallel
Definition
 1/Rtotal = 1/R1 + 1/R2 etc
Term
 capacitance
Definition
 C = Q/V = ε0(A/d)   If voltage V is applied across the plates of a capacitor and a charge Q collects on it then capacitance is C in farads (F). ε is the permittivity of free space (8.85 x 10-12 F/m), A is the overlap of the two plates of the capacitor, d is the distance apart
Term
 potential energy stored in a capacitor
Definition
 U = 1/2 CV2
Term
 capacitors in series and parallel
Definition
 the capacitance of capacitors in series is calculated like resistors in parallel and the capacitance of capacitors in parallel is calculated like resistors in series.
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