Question

What is the RMS current when \[V_{\mathrm{rms}}=220\,\mathrm{V}\] and \[Z=291.7\,\Omega\]?

Options

• \[I=\frac{V_{\mathrm{rms}}}{Z}\approx1.46\,\mathrm{A}\]

• \[I=\frac{Z}{V_{\mathrm{rms}}}\approx1.33\,\mathrm{A}\]

• \[I=\frac{V_{\mathrm{rms}}}{Z}\approx0.755\,\mathrm{A}\]

• \[I\approx291.7\,\mathrm{A}\]

Answer 1

RMS current equals RMS voltage divided by impedance. Dividing \[220\,\mathrm{V}\] by \[291.7\,\Omega\] gives approximately \[0.755\,\mathrm{A}\].