Current Electricity and Electrical InstrumentHard
Question
If the reading of ammeter is 2A then the reading of voltmeter
Options
A.Depends on R
B.Independent on R
C.Zero for certain value of R
D.can′t be determined
Solution
VP - VQ = 2(2R) ⇒ 4R = 24 - (2R)I1
⇒ I1R = 12 - 2E, E - I2(4R) = 4R, I1 + I2 = 2
⇒ E = 20R - 48
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