10. Your house is supplied with 240 Vfrom a powersouree which istted with a 13 A safe fuse.
What is the me'imum nurgber of mar bulbs that can be tted in the house?
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2. You are provided with the following apparatus
0 A voltmeter
0 An ammeter
0 A 1.5V dry cell
0 Six pieces of connecting wires
I A meter rule
- Mounted resistance wire
(a) Connect the voltmeter across the dry cell on an open circuit as shown in figure 2.1
(all)
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(d) From your graph determine / ' Curl
(i)Theslope SLOPQS : 7" _, l'o _ cyto/(Zniks)
We 33
(ii)ThelnterceptoftheRaxis : 2 C1755 (lmk)
a. Ynxue9k : ~l-5Ja 1/ I
(e) Given that R=(EA: 171) -J'
Where E is the emf of the cell, r is the internal res
(i) Determine the charge on C1 when switches s; are closed while 51 isopen
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(ii) After some time s; is opened and b
From your graph, determine: \ (13ch 40.x fix
(i) The slope of the graph \/1\"
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(ii)TheinterceptoftheL axis / 1 L \/
.L:. XHWCPP'C .3:.$.' 1M0 .(1mk)
(D) If M5 is the
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(ii) Using the balance, weigh the mass of M in grams M:ODO;L3% (Vzmk)
(iii) Determine the spring constant k in Newton per meter if g=10.0rns'2 / )
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(lmk)
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(B) P
7. State and expiain twe factors affecting the ofan electromagnet.
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8. An alternating voitage o ,ak value 15V and frequency 25H: is applied to
1. You are provided with the following apparatus
0 A metre rule
0 A mass marked M
0 Six 20g masses
0 A stop watch
I A complete stand
0 A balance for sharing
Arrange the apparatus as shown in the figure 1,1(a) below
HHHU
E.L
metre rule
/
E.L is Equil
cork
5. The gure below shows a set up used to study sound waves.
air
It' rs observed that when the bottle' rs shaken sound :5 heard. State and explain the observatbn
that would be made lfa Irttle hotwater is poured into the battle then the curl: isghtly
27.
28.
Using cosine rule
7.82 = 6.62 + 5.92 2 x 6.6 x 5.9 cos R
Cos C = 6.62 + 5.92 7.82
2 x 6.6 x 5.9
= 43.59 + 34.81 60.84
= 78.37 60.84
77.88
77.88
= 17.53 = 0.2251
77.88
C = 77o
7.8 = 2r r = 7.8
Sin 77
2 x sin 77
= 4cm
Area of circle = 3.142 x 42
= 5
2. (A) You are provided with the following:
- 2 dry cells
- A cell holder
- A nichrome wire mounted on a metre rule
- An ammeter, A
- A voltmeter, V
- A jockey J
- A switch S
- 8 connecting wires
Proceed as follows:
(a)
Set the apparatus as shown in fig 3
1.
27.
Triangle ABC is inscribed in the circle. AB= 7.8cm, AC 6.6cm and BC= 5.9cm. Find:
B
7.8cm
A
6.6.cm
5.9cm
C
28.
The
(a) The radius of the circle correct to one decimal place
(b) The area of the shaded region
The figure below shows two circles centre
= 27.93o
B1
4.
a) 180/300 x 2 x 22/7 x 6370 cos 48
b) Km = (180 96) x 2 x22/7 x 6370
360
= 84/360 x 2 x 22/7 x 6370
Time = 9342
= 33.36 km/hr
280
c) = 180
time = (4 x 180) = 12 hrs
60
(14:15 12:00) = 2:15a.m
d) 600 Nm
60
60
Q = (12N, 30W)
5.
6.
Long Diffe
= 8/150 + 6/150 + 9/300 + 3/ 300
2.
= 40/300 = 2/15
a) Construction of AB B1
Construction of BC B1
Construction of AC B1
b) Construction of bisect of AC B1
Construction of bisect BC
B1
Radius 3.6 cm
B1
c) Construction of bisect < CAB B1 OC B1
Construction
26.
The figure below shows two intersecting circles with centres P and Q and radius 5cm
and 6cm respectively. AB is a common chord of length 8cm. Calculate;
A
5cm
6cm
Q
P
:
B
(a) the length of PQ
(b) the size of;
(i) angle APB
(ii) angle AQB
(c) the area
l C dacx
\
(d) From your graph determine / 1 WW
. )J
(IlTheslope Slope. 1.8 Zro . 0 ,3 3A5) 2
" ' : ' (1 Q,
(ii) The intercept of the R axis (lmk)
Q'mrwt :HLZ IL \/7
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p t
(e) Given that R=(E. 1/1) -I
Where E is the emf of the cell, r is the i
(a) A campus needte is placed below a currerit carrying conductor as shown below.
Conductor
/
Indicate on the iagram the directian of the current. i 1 Mark)
(b) State the difference between a soft magnetic material and a hard magnetic materiai.
4 (3) De
a
(1')
The two graphs below represent the variations of angies Z and Y for different sizes of incident
angle, X.
0
What process is represean by: /
e'izd \Vrnui
(I) Line on LpicefCmBIeqc"1"7'"'"' @(1 mark)
(u) Curve up" Yf'tm .k. "uh/MW" cfw_1 mark
For t
16. a.
Figure 12 below represents dots made on a tape by ticker timer. The dots were
made at a frequency of 50 dots per second.
1.5 cm
4.5 cm
What is the time interval between the two consecutive dots
16. b.
Draw an arrow on the tape that indicates the do
16. a. Figure 13 below shows a rectangular block of height 10cm floating vertically in a
beaker containing 2 immiscible liquids A and B of densities 800Kg/m3 respectively. The
dimensions of the block are 3cm long by 2cm wide by 10cm high.
Liquid A
2cm
Liq