Question

Three resistance of 10 ohm 15 ohm and 30 ohm are connected in parallel . The total resistance of the combination is

Answer 1

Answer:

The correct answer is 5.

Explanation:

For resistances that are connected in parallel, the formula is,

Reciprocal of the equivalent resistance = Sum of reciprocal of all the resistances.

Now, we have,

R1= 15 ohm; R2= 10 ohm and R3= 30 ohm

Then equivalent resistance is 1/R = 1/R1 + 1/R2 + 1/R3

1/R = 1/15 + 1/10 + 1/30

1/R = 6/30

1/R = 1/5

R= 5 ohm

Credits:

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Answer 2

Answer:

The total resistance of the combination is 5ohm

Explanation:

To find: The total resistance of the combination

Given : Three resistance  are given 10 ohm,15 ohm, 30 ohm respectively.

The resistance are combined in parallel.

Solution : Let the total resistance of the combination R.

∴ 1/R= 1/10+1/15+1/30

          =3+2+1/30

          =6/30

           =1/5

1/R =1/5

R= 5ohm

∴Total resistance of combination is 5ohm.

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