4.3

Question 1

Kirchhoffs second law

Answer 1

In any closed loop the sum of the emf is equal to the sum of the products of the current and resistance

Question 2

Potential dividers

Answer 2

Varying the ratio of a pair of resistors changes the output voltage ions circuit

Question 3

Terminal potential difference

Answer 3

Pd measured around the terminals of the battery. The difference between this and the emf is the lost volts

Question 4

Graphical method for finding emf and internal resistance

Answer 4

-r= gradient 
Emf= y intercept