Answer to Question #97820 in Electric Circuits for C

Question

In an electric circuit,let’s say the switches are all closed and the EMF reads 10V,now the switch is opened somewhere in the circuit,will the EMF drop or will it always stay the same?And also with internal resistance,does it change if we add more resistors to the circuit?Does EMF or internal resistance change if we add more resistors or take out resistors?please show me different set ups and how they work?Thanks

Answer 1

EMF will not decrease when the switch is opened. Also, the EMF and internal resistance will not change when the resistance of the circuit changes.

Since the EMF and internal resistance depends on the power source, and not on the external circuit.