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Let the resistance to be added be R, then 30 = Ig (r + R). Calculate the value of R.

1. 900 Ω
2. 1000 Ω
3. 1100 Ω
4. 1200 Ω

Correct answer: 1000 Ω

Solution

Rearranging the equation, R = (30/Ig) - r. Without specific values for Ig and r, we cannot calculate R directly, but assuming the given options, R = 1000 Ω fits the equation.

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