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A micro-ammeter has a resistance of 100 Ω and a full scale range of 50 μ A. It can be used as a voltmeter or as a higher range ammeter provided a resistance is added to it. Pick the current range and resistance combinations.?
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A micro-ammeter has a resistance of 100 Ω and a full scale range of 50...
I = [V / (G + R)]
∴ 50 x 10^–6 = [10 / (100 + R)]
∴ 100 + R = [10 / (50 x 10^–6)]
100 + R = 0.2 x 106
∴ R = 199.9 KΩ
R = 200KΩ
∴ V = 10V with 200kΩ in series.
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A micro-ammeter has a resistance of 100 Ω and a full scale range of 50 μ A. It can be used as a voltmeter or as a higher range ammeter provided a resistance is added to it. Pick the current range and resistance combinations.?
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