H2P-300
Potential dividers
H2 Physics · JC 2 · Medium · Potential dividers
A potentiometer wire of resistance 5.0 Ω is connected in series with a resistor to a 4.0 V cell of negligible internal resistance. The potential difference required across the whole wire is 10 mV. What is the value of ?
- 2.0 kΩ (approximately)
- 200 Ω
- 5.0 Ω
- 20 kΩ
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