A simple ohmmeter is made by connecting a 1.50 V flashlight battery in series with a resistance R and an ammeter that reads from 0 to 1.00 mA shown in Figure. Resistance R is adjusted so that when the clip leads are shorted together, the meter deflects to its full-scale value of 1.00 mA. What external resistance across the leads results in a deflection of?

(a) 10.0%,

(b) 50.0%, and

(c) 90.0% of full scale?

(d) If the ammeter has a resistance of 20.0Ω and the resistance of the battery is negligible, what is the value of R?

Transcribed Image Text:

0-1.00 mA