Question

Two resistance each of 2 ohm are connected in series and in parellel separately.Equivalent resistance is-

• A. $4\Omega ,1\Omega$
• B. $1\Omega ,4\Omega$
• C. $2\Omega ,2\Omega$
• D. $4\Omega ,4\Omega$

Answer 1

Answer: (A)

$4\Omega ,1\Omega$

When resistance in series
$R_{eq}=R_1+R_2=2+2$
Equivalent resistance =$4\Omega$
When resistance in parallel
$\frac{1}{R_{eq}}=\frac{1}{2}+\frac{1}{2}$
$\frac{1}{R_{eq}}=\frac{1+1}{2}$
$\frac{1}{R_{eq}}=\frac{2}{2}$
$R_{eq}=1\Omega$