electricity Flashcards
current, resistance, pd
V=IR
current, time, charge
Q=It
pd, power, current
P=IV
resistance, power, current
P=I^2 R
time, energy, power
P=E/t
Mega, kilo, milli, micro (power of 10)
10^6, 10^3, 10^-3, 10^-6
RP1(R in Series)=
Ammeter=______
CV=_______&_______
Relationship______
Ammeter= in series
CV= resistors have same value & temp of resistors remain the same
Relationship= Current is inversely proportional to number of resistors
RP2(R in Parallel)
Relationship=______
Reason=______
Relationship= adding resistors in parallel will increase current flowing
Reason= more paths for current to flow, decreasing overall circuit resistance
RP3(length of wire affecting R)
Ammeter=_____
Voltmeter=______
Relationship=_______
CV=______
Ammeter=in series
Voltmeter= in parallel
Relationship=resistance of wire is directly proportional to its length
CV= temp of wire remains the same
RP4(current vs volts)
Ammeter=____
Voltmeter=______
Variable resistor=_____
Ammeter=series
Voltmeter=parallel
Variable resistor=series
diagrams for:
Resistor
Filament bulb
Diode
R= ↗️
Filament bulb=⤴️↗️
Diode=⤴️
UK mains supply
Pd=
A.c=
Frequency=
Pd= 230 volts a.c
A.c= alternating current
Frequency= 50 Hz
Wiring a plug
Live=______
Neutral=______
Earth=_______
Live= Brown (bottom right, 230V)
Neutral=Blue (bottom left, 0V)
Earth= Yellow/green (safety wire, 0V)
FUSE=
A ____ piece of wire that will ____ if too large a current flows through the ____ wire. (1A, 3A, 5A, 13A)
Fuses prevent F_R_S
thin, melt, live
Fires
EARTHING=
Prevents E___T_O__TI_N if a fault occurs & the ____ wire touches the ____ casing of an appliance.
Possible electric shock/death
Electrocution, live, metal