Discussion
Measuring the voltage across a 10 M\( \Omega \) resistor in a divider with a 10 M\( \Omega \) voltmeter would give a reading that is
Answer: D
The instrument puts ten megohms across ten megohms, giving five, so the divider ratio changes from a half to a third. The reading is therefore two thirds of the true value. High resistance circuits need an electrometer input or a much higher impedance instrument.
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