A method for finding total resistance of parallel resistors is which of the following?

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Multiple Choice

A method for finding total resistance of parallel resistors is which of the following?

Explanation:
When resistors are in parallel, the same voltage drives all of them and the currents add up. The total or equivalent resistance is found by taking the reciprocal of the sum of the reciprocals of each individual resistance: 1/R_eq = 1/R1 + 1/R2 + ... . This reciprocal-sum method works for any number of resistors in parallel, which is why it’s the best choice. If you only have two resistors, you can simplify to R_eq = (R1*R2)/(R1+R2), but that’s just a special case of the same principle. If all resistors are equal, you’d get R_eq = R/n, another consequence of the same relationship. The other option isn’t a standard method, and the equal-value note describes a special case rather than the general procedure.

When resistors are in parallel, the same voltage drives all of them and the currents add up. The total or equivalent resistance is found by taking the reciprocal of the sum of the reciprocals of each individual resistance: 1/R_eq = 1/R1 + 1/R2 + ... . This reciprocal-sum method works for any number of resistors in parallel, which is why it’s the best choice. If you only have two resistors, you can simplify to R_eq = (R1*R2)/(R1+R2), but that’s just a special case of the same principle. If all resistors are equal, you’d get R_eq = R/n, another consequence of the same relationship. The other option isn’t a standard method, and the equal-value note describes a special case rather than the general procedure.

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