THERE ARE THREE SOURCES OF RESISTANCE IN A PARALLEL CIRCUIT,S . TWO OF THEM ARE RATED AT 20 OHMS THE OTHER AT 10 OHMS WHAT IS THE CIRCUIT,S TOTAL RESISTANCE.

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To calculate the total resistance in a parallel circuit, you need to use the following formula:

1/RTotal = 1/R1 + 1/R2 + 1/R3 + ...

Where RTotal is the total resistance and R1, R2, R3, ... represent the individual resistances.

In this case, there are three resistances in parallel: two with a rating of 20 ohms each and one with a rating of 10 ohms.

So, let's substitute these values into the formula:

1/RTotal = 1/20 + 1/20 + 1/10

To simplify the equation, we can find the common denominator, which is 20:

1/RTotal = 1/20 + 1/20 + 2/20

Now, we can add the fractions together:

1/RTotal = 4/20

Simplifying further by dividing both numerator and denominator by 4:

1/RTotal = 1/5

Now, we take the reciprocal of both sides of the equation:

RTotal = 5 ohms

Therefore, the total resistance of the circuit is 5 ohms.