A circuit is shown below. (1) If \( A \) is an ideal ammeter, \( B \) an ideal battery of voltag...

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A circuit is shown below.
(1) If \( A \) is an ideal ammeter, \( B \) an ideal battery of voltage \( V \), and \( C \) an ideal voltmeter, the ratio reading of \( C / \) reading of \( A \) is \( R \).
(2) If \( A \) is a capacitor, \( B \) an ideal ammeter and \( C \) an ideal battery of voltage \( V \), the potential difference across the capacitor is zero.
(3) If \( A \) is an ideal ammeter, \( B \) an ideal battery of voltage \( V \), and \( C \) an ideal voltmeter, the ratio reading of \( C / \) reading of \( A \) is \( R / 2 \).
(4) If \( A \) is a capacitor, \( B \) an ideal ammeter, and \( C \) an ideal battery of voltage \( V \), the potential difference across the capacitor is \( 2 \mathrm{~V} \).
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