Series and Parallel Circuits Handout PART 2

Example 6) Series Circuit

a) Find the equivalent resistance RT

 

b) Find the current (I_T) going through this circuit

    VT = I_T R_T

c) Find potential drop across R1 and R2
 

V = I R

V1 =

V =

a) Find the combined resistance ( R_T )

b) Find the current in R₁

c) Find I₃

In a series circuit: The potential drop (V) across a resistor is proportional to resistance
Example 8)

If the voltage drop across the 3 ohms resistor is 4 volts then the voltage drop
across the 6 ohm resistor is _________ volts

a) Find the total voltage in this series circuit ________

b) Find the combined resistance in this circuit ________

c) Find the total current in this circuit _________

II) Electric Power

    Power - time rate of doing work or expending energy

        (watts ) P = W (J)/ t (seconds)

        since V = W/q , CROSS MULTIPLY then W = _____

    SUBSTITUTE *** P = Vq/ t = ____________________

All these equations are in the reference table
 

P = VI since V = IR …. THEN P = _______ since I = V/R …

THEN P = _________________

Electric Energy and Heat

(W) Electric energy consumed or released as heat

All these equations are in the reference table

(J) W ____________________________________