Chapter 9 - Energy, Power And Resistance Flashcards
1
Q
Def - Potential Difference:
A
Potential Difference - The work done per unit charge
Potential Difference - The energy lost per unit charge
2
Q
Def - Electromagnetic Force
A
Electromagnetic Force - The energy gained per unit charge
3
Q
Def - Resistivity
A
Resistivity - Resistance of an area across its length
4
Q
Def - Resistance
A
The opposition to the flow of current
5
Q
State one difference and one similarity between e.m.f. and p.d.
A
Similarity - Same SI units
Difference - e.m.f. is voltage given out by a component and p.d. is voltage taken in by a component
6
Q
Def - Ohm’s Law
A
For a metallic conductor at constant temperature, the current is directly proportional tto the p.d. across its ends
