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Two resistors of resistance 1 kilo ohm and 2 kilo ohms are in series and a source of 100 volts and negligible resistance is connected to it a voltmeter of 500 ohm is connected in turn across the resistors what are the reading of the voltmeter and how these readings differ from the reading of an ideal voltmeter? Can someone please give me it's solution
Condintion for ideal voltmeter is R must be infinite. R eq. = 3500 ohms. Apply ohm's law , V=iR i=100/3500 A = 1/35 ACurrent flowing in the series is i=1/35 ASince combination in series so all current is same everywhere. In voltmeter when it is not ideal having Resistance 500 ohm , V=1/35 x 500 V V=14.29vVoltmeter when it is ideal means R equals to infinite ,i.e. ,V=iR = tends to infinite.
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