As the frequency of the ac voltage across a capacitor approaches zero, the capacitive reactance of that capacitor:___________. A) appr

Question

As the frequency of the ac voltage across a capacitor approaches zero, the capacitive reactance of that capacitor:___________.
A) approaches zero.
B) approaches infinity.
C) approaches unity.
D) none of the given answers

in progress 0
Thiên Di 5 years 2021-08-06T10:35:31+00:00 1 Answers 46 views 0

Answers ( )

  1. thucuc
    0
    2021-08-06T10:36:57+00:00
    Reply

    Answer:

    B) approaches infinity

    Explanation:

    The capacitive reactance of an AC capacitor is given by;

    X_C = \frac{1}{\omega C } = \frac{1}{2\pi f C}

    Where;

    C is the capacitance

    f is the frequency of the ac voltage

    X_C = \frac{1}{\omega C} = \frac{1}{2\pi f C} \\\\X_C = \frac{1}{2\pi f C} \\\\X_C = \frac{1}{2\pi (0) C} \\\\X_C = \frac{1}{0} \\\\X_C = \ infinity

    Therefore, as the frequency of the ac voltage across a capacitor approaches zero, the capacitive reactance of that capacitor approaches infinity.

    The correct option is (B) approaches infinity

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )