Question

Calculate the potential difference required across a conductor of resistance 5 ohm to make a current of 1.5 A flow through it.
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Answer 1

$\bf{\underline{\underline{Given :}}}$

$\mathsf{\bigstar\: Resistance \:(R) = 5 ohm}$

$\mathsf{\bigstar\: Current \: (I) = 1.5 A }$

$\bf{\underline{\underline{To\: find}}}$

$\mathsf{\bigstar\: Potential\: difference\:(P.D)}$

$\bf{\underline{\underline{Solution}}}$

$\mathsf{We\:know\:that}$

$\fbox{\mathsf{ \red{P.D = Current × Resistance} }}$

$\mathtt{\implies\: Or \:\: V = IR}$

$\mathtt{\rightarrow\: 1.5\: A × 5 \: ohm}$

$\mathtt{\rightarrow\: \large{\frac{15}{\cancel{10}}} A × \cancel{5} \: ohm }$

$\mathtt{\rightarrow\: \Large{\frac{15}{2}} }$

$\fbox{\Large{\mathtt{\green{\rightarrow\: 7.5 \:V}}}}$

Therefore, 7.5 volt is required across the given circuit to make the current flow