Question

plzz give step by step answers....plzz its urgent..std 10 chp electricity​

Answer 1

Explanation:

ANSWER:-

Given:-

• 3 Equal wires
• And they have same Resistances.
• They are also connected in Parallel.
• Resistance =?

We know that in Parallel Combination:-

• If x is the total Resistance,
• If a,y and z are the other Resistances.

$\dfrac{1}{x} = \dfrac{1}{a} + \dfrac{1}{y} + \dfrac{1}{z}$

So, if it is given that all Resistances are same:-

Let the Each resistance be considered AS x.

Let total Parallel Resistance be R.

1/R(parallel) =

$\frac{1}{\frac{1}{3}} + \frac{1}{\frac{1}{3}} + \frac{1}{\frac{1}{3}}$

$\frac{1}{R(parallel)} = \frac{3}{\frac{1}{3}}$

R = x/9

So, x/9 is the total effective Parallel Resistance.

If in Case a Series Combination:-

• Remember that in Series combination, IT follows simple Addition
• we need to simply add the given Resistances.

Note:-

• Parallel Resistances decreases the effective Resistance
• Series Resistances increases effective Resistance.
• Moreover Parallel combination allows things to work independently so used in house wiring
• While in series Resistances if any thing is damaged IT affects the whole Circuit combination.