Question

If 10 resistances each of 15 ohm are connected in parallel, the equivalent resistance is
Options
a) zero
b)15
c) 150
d)1.5
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Answer 1

Answer:

d) 1.5

Explanation:

1/15*10 = 1/Req

2/3=1/Req

Req=3/2

Req=1.5 Ohms

Answer 2

Given,

10 resistances of 15 Ω each connected in parallel.

To Find,

The equivalent resistance of the combination.

Solution,

The formula for calculating the equivalent resistance when resistors are connected in parallel is

1/R' = 1/R₁+1/R₂+...

where R' is the equivalent resistance.

So,

1/R' = 1/15+1/15+...10 times

1/R' = 10(1/15)

1/R' = 10/15

R' = 15/10

R' = 3/2 = 1/5 Ω

Hence, the correct answer is option (d) 1.5