Question

$1$ ampere of current is flowing in the electrical circuit as shown in the above figure.
Identify between which two points is the resistance value the largest?

• A. Between points $A\to B$
• B. Between points $B\to C$
• C. Between points $C\to D$
• D. Between points $D\to E$
• E. Between points $E\to A$

Answer 1

The correct option is C Between points $C\to D$

Given - $V=12volt,I=1A$ ,

Resistance between point $A$ and $B$ ,

$R=1\Omega$

Resistance between point $B$ and $C$ ,

$R=2\Omega$

Resistance between point $C$ and $D$ ,

$R=6\Omega$

Resistance between point $D$ and $E$ ,

$\frac{1}{R}=\frac{1}{12}+\frac{1}{4}$ (as resistances are in parallel)

or $R=12\times 4/12+4=48/16=3\Omega$

resistance between points $C$ and $D$ is highest.