B5 solutions: Potential dividers
1. A voltmeter with resistance 10kΩ is used to measure the pd across the 1kΩ resistor in the circuit below. Calculate the percentage difference between the value with and without the voltmeter. Solution 2. A potential divider cct is made by stretching a 1m long wire with a resistance of 0.1Ω per cm from A to B as shown. A varying PD is achieved across the 5Ω resistor by moving the slider along the resistance wire....