Question

$1$ ampere of current is flowing in the electrical circuit as shown in the above figure.
Identify between which two points the voltage drop is 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. None of these

Answer 1

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

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

Resistance between point $A$ and $B$ ,

$R=1\Omega$

therefore voltage drop between $A$ and$B$ ,

$V=IR=1\times 1=1volt$

Resistance between point $B$ and $C$ ,

$R=2\Omega$

therefore voltage drop between $B$ and$C$ ,

$V=IR=1\times 2=2volt$

Resistance between point $C$ and $D$ ,

$R=6\Omega$

therefore voltage drop between $C$ and$D$ ,

$V=IR=1\times 6=6volt$

Resistance between point $D$ and $E$ ,

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

therefore voltage drop between $D$ and$E$ ,

$V=IR=1\times 3=3volt$

voltage drop between points $C$ and $D$ is highest.