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  4. Resistances of 100 Ω and 200 Ω are connected in series with 220 V mains. When a voltmeter of 1000 Ω resistance is connected in parallel to 100 Ω , then the reading of voltmeter is

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Q. Resistances of $100 \, \Omega $ and $200 \, \Omega $ are connected in series with $220 \, V$ mains. When a voltmeter of $1000 \, \Omega $ resistance is connected in parallel to $100 \, \Omega $ , then the reading of voltmeter is

NTA AbhyasNTA Abhyas 2020Current Electricity

Solution:

Solution
$R_{e q}=\frac{3200}{11}\Omega $
$V=\frac{220}{\left(\frac{3200}{11}\right)}\times \frac{1000}{11}=\frac{2200}{32}=68.75 \, V$