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4. An ammeter has an internal resistance of 50 Ω. The meter movement itself can handle up to 1 mA. If 10 mA is applied to the meter, the shunt resistor, RSH1, is approximately ________.
(a) 55 Ω
(b) 5.5 Ω
(c) 50 Ω
(d) 9 Ω
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