Summary GCSE physics notes A+ kerboodle

Current= rate of flow of electric charge
Potential difference= the difference of electrical potential
between two points(Energy involved)
Resistance= Anything that slow down charge flow

Circuit Symbols




Battery




LDR(Light dependent resistor), used to
detect light levels




Theristor, predictable and resistance is dependent on
temperature

, Equation
Q(C)= I(A)*t(s) Q is the charge in coulombs, C
I is the current in amperes, A
T is the time in seconds, s

V= I(A)*R(Ω) V is the potential difference in voltage, V
I is the current in amperes, A
R is the resistance in ohms, Ω

E(J)= V*Q(C) E is the energy transferred in joules, J
V is the potential difference in voltage, V
Q is the charge in coulombs, C

E(J)= P(W)*t(s) E is the energy transferred in joules, J
P is the power in watts, W
T is the time in seconds, s

P(W)=I(A)*V P is the power supplied in watts, W
I is the current in amperes, A
V is the potential difference in voltage, V

P(W)=I2(A2)*R(Ω) P is the power supplied in watts, W
I is the current in amperes, A
R is the resistance in ohms, Ω

Total R(Ω)=R1+R2 The total resistance of two or more
components in series is equal to the sum of the resistance of each
component