Question

Q1.when resistance 60 ohms and 90 ohms are connected in parallel . how to calculate equivalent resistance .​

Answer 1

Explanation:

✬ Equivalent Resistance = 36 ohms ✬

Explanation:

Given:

Resistors of resistance of 60 ohms and 90 ohms are connected in parallel.

To Find:

What is the equivalent resistance ?

Formula to be used:

1/Rp = 1/R1 + 1/R2...

Solution: Let Rp be the equivalent resistance.

Here we have

R1 = 60 ohms

R2 = 90 ohms

Substitute the values on formula

⟹ 1/Rp = 1/60 + 1/90

LCM of 60 and 90 is 180.

⟹ 1/Rp = 3 + 2/180

⟹ 1/Rp = 5/180

⟹1/Rp = 1/36

⟹ Rp = 36 ohms

Hence, the equivalent resistance is 36 ohms.

[ To find equivalent resistance of resistors connected in series ]

R = R1 + R2 + R3....

[ For parallel ]

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