The student made different concentrations of a solution of red food dye by varying the number of drops of dye added to 20 cm3
meter X. The following results were obtained.
Number of drops of food colouring 012345678 Resistance (Ω)
a. Draw a graph of the results obtained. b. State one conclusion which is supported by the results. c. Name meter X, which was used to determine the resistance of the LDR. d. Name a piece of equipment the student could have used to accurately measure 20 cm3
j Go to page 157 of your Assessment Book to answer more exam-style questions. 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
of water. The resistance of the LDR was then determined using