Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
|
What is the total resistance of two resistors in series? |
The sum of their individual resistances |
|
|
What is the total resistance of two resistors in parallel? |
1/R = 1/Resistance of resistor 1 + 1/Resistance of resistor 2 |
|
|
How does charging by friction occur? |
Rubbing two insulators together transfers electrons from one to the other |
|
|
What is potential difference? |
A measure of the energy transferred by each electron passing through two points |
|
|
How are voltmeters attached to circuits? |
They are attached in parallel to the section of circuit which is being measured |
|
|
How are ammeters attached to circuits? |
They are attached in series to the section of circuit which is being measured |
|
|
What is the formula for resistance? |
R = V/I |
|
|
What is the relationship between resistance and p.d. in a lightbulb? |
Resistance increases as p.d. increases |
|
|
What is the relationship between resistance and length of a wire? |
Resistance is proportional to length |
|
|
What is the relationship between resistance of wire and cross-sectional area? |
Resistance is inversely proportional to cross-sectional area |
