KCSE Past Papers 2013 Physics paper 3 (232/3)

5.4.3 Physics Paper 3 (23213)

PART A

(d) (i) See graph (5 marks) Scale and axis

Plotting

Line

250—350

(ii) Slope = 2 ;

\d (42 18) X 10

(iii) K

d (1) = -4.2 >< 10* S‘cm’2; (3 marks)

= / 41:<10

= 963 S“cm’2;

1. PART B

(c) 1=0.1m

b=0.0l m

m=0.06 kg

0/W

(g) p = Lg“ (0.11 + 0.011)

= 2.02 >< 10*‘

(i) (I) (II) t=75s

T=7.5s 2 c

2. PART A

G = 1.42 >< 10

unit not required.

(b) V0 = 3.0V

PART B

(h) (i)

(ii) W

k

Vo1tage(V)

2.5 2.25 2.0 1.75 1.5 1.25

Time(s)

1.7 2.6 3.9 4.8 6.5 7.9

(i) see graph

(ii) t% =6.4 S

R I 6.4 X10“

0.693 >< 2200

= 4200 Q

LI = 47.4 cm

= 0.68 N

_ 0.474 >< 0.05 >< 10

I ‘ 0.35

(I) L2=28 cm

_ 0.28 X 0.05 ><10

1- 0 35

(11) w

= 0.4 N

T1 = 26°C

Accept (18 – 32°C)

(i) L3 = 28.5 cm

(ii) T2 = 83°C

Accept (60 – 95°C)

(iii) W3 = 0.285 X 10

= 0.41

K = (0.68 — 0.4)— (0.68— 0.41)

(0.68 — 0.41) (83— 26)

= Milli

0.27 >< 57

= 6.5 >< l0“‘K”

 

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