Chapter 18 Flashcards
1
Q
What is resistance?
A
The resistance of an object is the ratio of the voltage across it to the current through it.
2
Q
What is a resistor?
A
A resistor is a device that converts electrical potential energy to any other form of energy
3
Q
State Ohm’s Law.
A
Under constant physical conditions (resistance & temperature), the current flowing through a conductor is proportional to the potential difference across it.
4
Q
What is resistivity?
A
Resistivity (ρ) is the product of the resistance of a body and its cross-sectional area per unit length.
