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

Question

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 (A)  text68.5 volts (B)  text6.87 volts (C)  text587.5 volts (D)  text58.75 volts

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="Solution" src="https://cdn.tardigrade.in/q/nta/p-gwlzoukidebu.png" /> Re q=(3200/11)Ω V=(220/((3200)11))× (1000/11)=(2200/32)=68.75 V

Q. 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

$68.5 volts$

$6.87 volts$

$587.5 volts$

$58.75 volts$

$R_{e q} = \frac{3200}{11} Ω$
$V = \frac{220}{( \frac{3200}{11} )} \times \frac{1000}{11} = \frac{2200}{32} = 68.75 V$

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

68.5 volts

6.87 volts

587.5 volts

58.75 volts