A resistance-meter consists of five measurement range-settings that varies from 200 Ω and 2 MΩ in multiples of 10. The meter calculates resistance of a device by calculating a full-range voltage of 2 V across the device by passing an appropriate constant current for each range-setting. In case a device having a resistance value ranging between 8 kΩ to 12 kΩ and a maximum power rating of 100 μW is to be measured safely with this meter, the option for range-setting on the meter for best resolution in measurement, in kΩ, is
A. 2
B. 20
C. 200
D. 2000
Answer:C
A resistance-meter consists of five measurement range-settings that varies from 200 Ω and 2 MΩ in multiples of 10. The meter calculates resistance of a device by calculating a full-range voltage of 2 V across the device by passing an appropriate constant current for each range-setting. In case a device having a resistance value ranging between 8 kΩ to 12 kΩ and a maximum power rating of 100 μW is to be measured safely with this meter, the option for range-setting on the meter for best resolution in measurement, in kΩ, is
A. 2 B. 20 C. 200 D. 2000