Potential Divider and EMF

Question 1

What is the goal of a potential divider

Answer 1

supply constant or variable potential difference from a power supply

Question 2

What are some examples of potential dividers

Answer 2

variable resistors, LDR, thermistors

Question 3

What are the two ways of drawing potential divider circuits

Answer 3

Two components next to eachother to control voltage going through one component
Variable resistor to change resistance therefore change voltage supplied

Question 4

What is interal resistance

Answer 4

power supplies will have some collisions and therefore internal resistance

Question 5

What is the equation for Emf in circuit

Answer 5

E = I(R+r)

Question 6

What is the emf equation in general

Answer 6

E = E/Q

Question 7

What is the rule for internal resistance as current increases

Answer 7

greater the current the greater the internal resistance

Question 8

What happens if you have cells in series and parallel to internal resistance

Answer 8

in series interal resistance adds up

in parallel internal resistance effects are negated