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If an ammeter is to be used in place of voltmeter, then we must connect with the ammeter a :
If an ammeter is to be used as a voltmeter, a high resistance must be connected in series with it. This combination limits the current through the ammeter while allowing it to measure the potential difference accurately.
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An ammeter has low internal resistance and is designed to measure current by connecting in series with the circuit. To use it as a voltmeter, a high resistance must be connected in series to limit current and measure potential difference. This combination ensures minimal current through the meter while allowing voltage measurement.
Answer: (D) high resistance in series.
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