No. 1 Answer Mark (a) (i) Manipulated variable = The length, lof the wire X 1 (a)(ii) Responding variable = The angle, θ 1 (a)(iii) Constant variable = The distance from to the needle !! the diameter of the wire ! !the material of wire X 1 (b)(i) (ii) "a lues of θ are correct (ll values are correct # $M) (%ne value incorrect # &M) Tabulate land θ correctly in the table. A'hows a table which have l, and θ B'tate the correct unit of l/cm andθ !Cll values of lare correct D "alues of land θ are consistent l/cm θ /° 50.0 36 40.0 30 30.0 21 20.0 16 10.0 9 1+1 1 1 1 1 (c) Draw the graph of θ against l. *abel +ais and ais correctl+ - 'tates the unit at the ais correctl+ C -oth aes with the even and uniform scale# . / points correctl+ plotted# 0 a smooth best straight line 1 minimum si2e of the graph is / 3 s4uares of $ $ cm5 Number of !core 6 / / 3 73 7 $ $ & & 5 (d) !tate the correct relationship based on the candidate"s graph lis directl+ propotional to θ//lis increasing linearl+ to θ1 (e) &The e+e8s of observer must be per pendicular to the scale reading in order to avoid the parallaerror5 $Repeat the eperi ment and find the average5 1 T#TA$ 16 SECTION A%A&'(N) !C*+%+ ,#& -A -+&
