electrical circuits

Question 1

kirchoffs first law

Answer 1

sum of the currents entering a junction is equal to the sum of the currents leaving a junction

Question 2

kirchoffs second law

Answer 2

in a closed loop the sum of the EMF is equal to the sum of the products of the current and the resistance

Question 3

series circuit rules

Answer 3

• current has same value everywhere
• EMF of the cell is equal to the sum of the potential differences across the resistors
• the total resistance of the circuit is equal to the sum of the individual resistors

Question 4

parallel circuit rules

Answer 4

• the total current in a parallel circuit is the sum of the individual branch currents
• the components in each branch of a parallel circuit share the same voltage as the cell

Question 5

potential dividers

Answer 5

potential divider circuits uses to two resistors in series to split or divide the voltage of the supply in a chosen ratio so that a chosen voltage can be provided to another device or circuit