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In figure shown A1, A2, A3 are ideal ammeters. If A1 and A3 read 5 A and 13 A respectively reading of A2 will be—
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- 8 A
- 12 A
- 18 A
- Indeterminate unless the actual values of R, C and W are specified
Correct Option: B
As we know that ammeter will read the rms value of the current applying the law of vector addition.
A2 3 = A2 1 + A2 2
or A2 2 = A2 3 + A2 1 = (13)2 – (5)2
= 169 – 25 A3 = 13 A
= 144 A1 = 5A
or A2 = 12 A2 =?