To find the total resistance in a series circuit, ______.

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Multiple Choice

To find the total resistance in a series circuit, ______.

Explanation:
In a series circuit, the same current flows through every component, so resistances simply add up. The total resistance is the sum of each individual resistance: R_total = R1 + R2 + … This is why the current path sees the combined opposition to current, and the total voltage is V_total = I × (R1 + R2 + …). For example, 4 Ω and 6 Ω in series give a total of 10 Ω. Subtracting, multiplying, or dividing would misrepresent how resistances combine in a single, shared current path—the correct operation is addition.

In a series circuit, the same current flows through every component, so resistances simply add up. The total resistance is the sum of each individual resistance: R_total = R1 + R2 + … This is why the current path sees the combined opposition to current, and the total voltage is V_total = I × (R1 + R2 + …). For example, 4 Ω and 6 Ω in series give a total of 10 Ω. Subtracting, multiplying, or dividing would misrepresent how resistances combine in a single, shared current path—the correct operation is addition.

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