Page 203 - WCS - Electrical

WORKSHOP CALCULATION & SCIENCE - CITS

Resistance connections
V - Voltage (in volts)
R - Resistance (in ohms)
I - Current intensity (in Amperes)
Series Connection
The total resistance is equal to the sum of all the resistances. In a series connection the end of the first load is
connected to the beginning of the second load and all loads are connected end to end.

Features of series connection:
• The same current flows through all the loads.

• The voltage across each load is proportional to the resistance of the load.
• The sum of the voltages across each load is equal to the applied voltage.
• The Total resistance is equal to the sum of all the resistances.
l = l = l = ...
1
2
V = V + V + ...
1 2
R = R + R + ...
1
2
Example
Three resistances of 3 ohms, 9 ohms and 5 ohms are connected in series. Find their resultant resistance.
Solution
R = R1 + R2 + R3

= 3 Ω + 9 Ω + 5 Ω
Total resistance = 17 Ω

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CITS : WCS - Electrical - Exercise 18