Question

If the ratio of current flowing through 2 ohm and 5 ohm resistances is 1 :n then what is the value of n

Answer 1

Answer:

0.4

Explanation:

V=IR. (a/c to Ohms law)

I=V/R

So,

I-1=V/R-1

• I-2=V/R-2

Now,

I-1/I-2=V×R-2/V×R-1

1/n= R-2/R-1

1/n= 5/2

5n=2

n=2/5

n=0.4

May it's helpful for you!

Answer 2

n=0.4

Explanation:

Current and resistance being inversely proportional to each-other, hence the current in the two resistances in parallel is in the ratio of inverse of their resistances.

$\frac{1}{n} =\frac{5}{2}$

$n=0.4$

Using Ohm's Law, we have the relation for the total current in the circuit as:

$V=R.I$

$\Rightarrow I=\frac{V}{R}$

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TOPIC: resistors in parallel

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