A voltmeter having a resistance of \( 1800 \Omega \) is employed to measure the potential differ...

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A voltmeter having a resistance of \( 1800 \Omega \) is employed to measure the potential difference across \( 200 \Omega \) resistance, which is connected to dc power supply of \( 50 \mathrm{~V} \) and internal resistance \( 20 \Omega \). What is the approximate percentage change in the potential difference across \( 200 \Omega \) resistance as a result of connecting the voltmeter across it?
(1) \( 2.2 \% \)
(2) \( 5 \% \)
(3) \( 10 \% \)
(4) \( 20 \% \)
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