Question

The number of 12Ω resistors connected in parallel to get an effective resistance of 4Ω is ​

Answer 1

Answer:

3

Explanation:

Its is given that effective resistance = 4ohm = Re

and one resistance is 12ohm = R

Now there is a formula for calculating no. of resistors, i.e.

1/ Re = n / R where n is no. of resistors

Now put the values in it

1 /4 = n/12

n = 12 / 4

n = 3