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Sagot :
The value of maximum current for A 35-mf capacitor which is connected to an ac source with a frequency of 400 hz and a maximum emf of 20 v is 1.76 ampere.
What is capacitance of capacitor?
The capacitance of a capacitor is the ratio of the electric charge stored inside the capacitance to the potential difference. The value of capacitive reactance can be calculated as,
[tex]X_c=\dfrac{1}{2\pi fC}[/tex]
Here, C is capacity and (f) is the frequency.
A 35-mf capacitor is connected to an AC source with a frequency of 400 hz and a maximum emf of 20 v.
[tex]X_c=\dfrac{1}{2\pi fC}\\X_c=\dfrac{1}{2\pi (35\times10^{-6})(400)}\\\X_c=11.37\rm\; ohm[/tex]
The maximum current flowing is the ratio of maximum emf to the capacitive reactance. Thus, the maximum current is,
[tex]I_{\text{RMS}}=\dfrac{V_{\text{RMS}}}{X_C}\\I_{\text{RMS}}=\dfrac{20}{11.37}\\I_{\text{RMS}}=1.76\rm\; Amp[/tex]
Thus, the value of maximum current for A 35-mf capacitor which is connected to an ac source with a frequency of 400 hz and a maximum emf of 20 v is 1.76 ampere.
Learn more about the capacitance of capacitor here;
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