Potential difference and potential at a point. With reference to a point find the potential at another point . The difference between the two points is the potential difference as read from a voltmeter.If the resistors have the same resistance of 30ohm and the battery is 6V. What is the range of voltmeter reading when the variable resistor changes from 0 to 30 ohm.
At 0 ohm: voltmeter reading is 3 V
At 30 ohms: voltmeter reading is 0 V
