Question

The reading of the ammeter as per figure shown is

• A. $\frac{1}{8}A$
• B. $\frac{3}{4}A$
• C. $\frac{1}{2}A$
• D. $2A$

Answer 1

The correct option is B $\frac{3}{4}A$

The equivalent circuit is:

Where the equivalent resistance is:\

$2\Omega +\frac{1}{\frac{1}{2}+\frac{1}{2}+\frac{1}{2}}\Omega$

$=2\Omega +\frac{1}{dfrac32}\Omega =2\Omega +\frac{2}{3}\Omega$

$=\frac{8}{3}\Omega$

Now, $V=2V$

$I=\frac{V}{R}=\frac{2}{\frac{8}{3}}A=\frac{3}{4}A$