A voltmeter with an internal resistance of 200 Ω when connected across an unknown resistance reads 250 V. The milliammeter internal resistance = 0 connected in series with the above combination reads 10 mA. The actual value of the unknown resistance is ___________

A voltmeter with an internal resistance of 200 Ω when connected acro

1.	A voltmeter with an internal resistance of 200 Ω when connected across an unknown resistance reads 250 V. The milliammeter internal resistance = 0 connected in series with the above combination reads 10 mA. The actual value of the unknown resistance is ___________
A.	25 kΩ
B.	200 kΩ
C.	28.56 kΩ
D.	20 kΩ
Answer» D. 20 kΩ