An electronic circuit has two 19-kΩ resistors, R1 andR2, connected in series as shown in (Figure 1) . The battery voltage is 10 V and it has negligible internal resistance. A voltmeter is connected across R1, as shown in (Figure 2) .
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What internal resistance should the voltmeter have to be in error by less than 4 % ?
Express your answer to two significant figures and include the appropriate units.