Question
Calculate the combined resistance in each case:
✓
Answer
- $R_1 = 500$ ohm, $R_2 = 1000$ ohm
$R = R_1 + R_2= 500 + 1000 = 1500$ ohm.
- $R_1 = 2$ ohm, $R_2 = 2$ ohm
$\frac{1}{\text{R}}=\frac{1}{\text{R}_1}+\frac{1}{\text{R}_2}$
$\frac{1}{\text{R}}=\frac{1}{2}+\frac{1}{2}$
$R = 1$ ohm
- $R_1 = 4$ ohm, $R_2 = 4$ ohm, $R_3$_
$\frac{1}{\text{R}}=\frac{1}{\text{R}_1}+\frac{1}{\text{R}_2}$
$\frac{1}{\text{R}}=\frac{1}{4}+\frac{1}{4}$
$R = 2$ ohm
Total resistance $= R + R_3$
$= 2 + 3 = 5$ ohm
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