Question

Calculate the total resistance of the circuit having a 15 ohm resistor, two 15 ohms parallel resistor, and three 15 ohms are also in parallel with a total of 6 resistors.​

Answer 1

Answer:

Total resistance = 27.5 ohms

Explanation:

R1 = 15

R2 = 15 || R3 = 15

R4 = 15 || R5 = 15 || R6 = 15

Since two resistors are in parallel, we should use the parallel formula (1/Req = 1/R2 + 1/R3), where Req = equivalent resistance

1/Req = 1/R2 + 1/R3

= 1/15 + 1/15

2/15

Req = 15/2

= 7.5 ohms

Same method applies on the 3 parallel resistors

1/Req = 1/R4 + 1/R5 + 1/R6

= 1/15 + 1/15 + 1/15

= 3/15

Req = 15/3

Req = 5 ohms

We can now find the total resistance

RT = 15 ohms for R1 + 7.5 + 5

RT = 27.5 ohms

Answer 2

Answer:

Resistance = 90 ohms

Explanation:

Just add them.