Electrical and Electronics Measurements Extension Ranges of Basic Meters

A moving coil instrument, having a coil resistance of 4.5 Ω gives a full-scale deflection of 30 mA. The resistance connected in parallel with this instrument to read up to 2.5 A is:

1
6.46 Ω 
2
0.0346 Ω
3
0.0546 Ω
4
0.0625 Ω

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