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H) Series and Parallel Circuits

UC Irvine

Onsite

Why is it a good idea to connect
Christmas lights 'in parallel'?

Circuits
Series and Parallel

Which kind of circuit do we have below?

Series

1) Series circuit - circuit that has only one current path

Dorling Kindersley Books

Ex 1) Ammeter – Meter that measures Current

Reference Table Equations

a) I_T = I₁ = I₂ = I₃ = ……

Total current
coming from source

=
 
current going
through each resistor.

b) R_T = R₁ + R₂ + R₃ + …… 

R_T = 6.0 ohms

c) V_T = V₁ + V₂ + V₃ + ……

d) V_T = I_TR_T  OR  R_T = V_T/I_T

Find total current (I_T)

V_T = I_TR_T

20. V = I_T(6.0 ohms)

I_T = 3.3 amps = I₁ = I₂

Parallel Circuit