A) \[\sqrt{{{R}^{2}}+\,{{(2\pi fL)}^{2}}}\]
B) \[\sqrt{{{R}^{2}}+\,{{(2\pi {{f}^{2}})}^{2}}}\]
C) \[\sqrt{{{R}^{2}}+\,L\pi {{f}^{2}}}\]
D) \[{{R}^{2}}-\,{{(2\pi {{f}^{2}})}^{2}}\]
Correct Answer: A
Solution :
\[Z=\sqrt{{{R}^{2}}+X_{L}^{2}}\] \[=\sqrt{{{R}^{2}}+{{(\omega L)}^{2}}}\] \[=\sqrt{{{R}^{2}}+{{(2\pi fL)}^{2}}}\]You need to login to perform this action.
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