Created by StemPy LabFive identical capacitors of each are first joined all in parallel, and then all in series. The two equivalent capacitances, and the ratio of the parallel value to the series value, are
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← A charge +4q and a charge -q are held a distance d apart. Apart from very far away, the electric field is zero at a pointA carbon resistor (temperature coefficient of resistance -5 × 10⁻⁴ °C⁻¹) is joined in series with a copper wire (temperature coefficient 4 × 10⁻³ °C⁻¹). The total resistance is 9 kΩ, and it does not change when the temperature changes a little. The resistances of the carbon and of the copper are →
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