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An electric lamp rated at 48 watts,12volts supply. Calculate the current flow in the lamp and the resistance.

Respuesta :

Let's use the formula of power.

[tex]P=I\cdot V[/tex]

Where P = 48 watts and V is 12 volts, let's use these magnitudes and solve for I.

[tex]48W=I\cdot12V[/tex]

Divide both sides by 12V.

[tex]\begin{gathered} \frac{48W}{12V}=\frac{I}{12V}\cdot12V \\ I=4A \end{gathered}[/tex]

Therefore, the current flow in the lamp is 4 A.

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