申論題

7. In Figure (4), a voltmeter of resistance Rv = 300 Ω and an ammeter of resistance R_A = 5.00 Ω are being used to measure a resistance R in a circuit that also contains a resistance R₀ = 100 Ω and an ideal battery of emf ε = 18.0 V. Resistance R is given by R = V/i, where V is the voltmeter reading and i is the current in resistance R. However, the ammeter reading is not i but rather i'. Thus, the ratio of the two meter readings is not R but only an apparent resistance R' = V/i'. Assume that R = 100 Ω. Calculate the apparent resistance R' ?