Question

the ammeter in the circuit pictured reads 22 ma. what is the resistance of the resistor in the circuit? 1 kω 100 ω 220 ω 18 ω 545 ω 0.545 ω 264 ω

Explanation:

Step1: Convertir la corriente a amperios

La corriente \( I = 22\space mA=22\times10^{- 3}\space A = 0.022\space A\)

Step2: Aplicar la ley de Ohm

La ley de Ohm es \( V = IR\), despejando \( R=\frac{V}{I}\). Dado que \( V = 12\space V\) y \( I = 0.022\space A\), entonces \( R=\frac{12}{0.022}\approx545.45\space\Omega\approx545\space\Omega\)

Answer:

545 Ω