![A resistance-meter has five measurement range-settings between 200 Ω and 2 MΩ in multiples of 10. The meter measures resistance](https://www.gkseries.com/blog/wp-content/uploads/2023/08/A-resistance-meter-has-five-measurement-range-settings-between-200-Ω-and-2-MΩ-in-multiples-of-10.-The-meter-measures-resistance-.jpg)
Q. A resistance-meter has five measurement range-settings between 200 Ω and 2 MΩ in multiples of 10. The meter measures resistance of a device by measuring a full-range voltage of 2 V across the device by passing an appropriate constant current for each range-setting. If a device having a resistance value in the range 8 kΩ to 12 kΩ and a maximum power rating of 100 µW is to be measured safely with this meter, the choice for range-setting on the meter for best resolution in measurement, in kΩ, is
(A) 2 (B) 20 (C) 200 (D) 2000
Ans: 200
Sol:
![](https://www.gkseries.com/blog/wp-content/uploads/2023/08/Screenshot-619.png)
Resistance to be measured
⇒ 8 kΩ to 12 kΩ
So, minimum range should be 20 kΩ.
With 20 kΩ range:
![](https://www.gkseries.com/blog/wp-content/uploads/2023/08/Screenshot-620.png)