Electrical Circuits Flashcards
1
Q
Potential difference
A
Work done per unit of charge
V= w/q
V= potential diff=v W = work =j Q = charge =c
2
Q
Emf
A
Electro motor force
Energy supplied by the battery per unit of charge
3
Q
Current
A
Rate of flow of charge (I)
I=q/t
4
Q
Conventional current
A
Flow of positive charge from positive to negative terminals of a battery
5
Q
In series
Vt = ?
(I)t = ?
A
Vt = v1 + v2 (I)t = I1 = I2
6
Q
In parallel
Vt =?
(I)t =?
A
Vt = V1 = V2 (I)t = I1 + I2
7
Q
Resistance
A
Opposition to the flow of charge
R=v/I
8
Q
Resistance in series
A
1) one path- current same at every point
2) voltage divides across resistors
3) resistance increases
9
Q
Resistance in parallel
A
1) more than one path - current splits
2) voltage same everywhere
3) resistance decreases
10
Q
Resistance parallel equation
A
1/r = 1/r1 + 1/r2.... Or Product of resistors —————————— Sum of resistors = R1xR2 / R1+R2
