Varying the Potential Difference and Current in a Circuit Flashcards
1
Q
what is a variable resistor called
A
a rhesostat
2
Q
what are the two things a rheostat can do in a circuit
A
- control the current in a circuit
- or give a continuously variable pd
3
Q
what would you call the rheostat if it were to provide a continuously variable pd
A
- a potential divider
- ones that are manufactured specifically for this purpose are potentiometers
