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Electric Potential and Potential Difference

Consider the ...

Question

Consider the circuit shown in the figure. An ideal voltmeter reads 10 $V$ across $X$ . If an ideal ammeter isconnected across $X$ it reads 5 $A$ . Find the value of $x$ in $Ω$ .

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Solution

Voltage across $x = 10 V$
$I$ across $x = 5 A$
$R = \frac{V}{I} = \frac{10}{5} \Rightarrow 2 Ω$

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