100% Real Waec Gce 2015 Physics Practical Answers.


1)
TABULATE
S/N;1,2,3,4,5
M(N):140,120,110,84,66
tita(degrees);24,32,38,51,62
Sin tita;0.4067,0.5299,0.6156,0.7771,0.8829

Note: 1cm=20N

vi) Slope(s)=(84-140)/(0.7771-0.4067)
=-56/0.3704
=-151N/degree

vii)
-I will ensure the experiment is repeated in the
specified number of times
-I will avoid error of parallax

bi)
-The total upward force must be equal to total
downward forc
-The sum of clockwise moment must be equal to
the sum of anticlockwise moment

(ii)Clockwise moment =m*10
Anticlockwise=Wsintita*40
=========================
wapbaze.org

3a)
(i)d1=1.40cm,
d2=1.55cm,
d3=1.75cm,
d4=2.1cm,
d5=2.3cm

Real values of di
d1=1.4*0.5=0.7mm
d2=1.55*0.5=0.77mm
d3=1.75*0.5=0.875mm
d4=2.1*0.5=1.05mm
d5=2.3*0.5=1.15mm

wapbaze.org rocks!
(ii)
Ia1=2.4A,
Ia2=3.8A,
Ia3=5.0A,
Ia4=7.4A,
Ia5=11.6A
Ib1=2.4A,
Ib2=3.6A,
Ib3=5.2A,
Ib4=7.5A,
Ib5=11.6A

(iii)
I=(Ia+Ib)/2
I1=(2.4+2.4)/2=2.4A
I2=(3.8+3.6)/2=3.7A
I3=(5.0+5.2)/2=5.1A
I4=(7.4+7.5)/2=7.45A
I5=(11.6+11.6)/2=11.6A

(3aiv)
logd1=log0.7=-0.15mm
logd2=log0.775=0.11mm
logd3=log0.875=0.06mm
logd4=log1.05=0.02mm
logd5=log1.15=0.06mm
logI1=log2.4=0.38
logI2=log3.7=0.57
logI3=log5.1=0.71
logI4=log7.45=0.87
logI5=log11.6=1.06

wapbaze.org rocks!
(3av)
TABULATE
S/N; 1,2,,3,4,5
di(cm);1.40,1.55,1.75,2.10,2.30
di(mm);0.70,0.78,0.88,1.05,1.15
Ia(A);2.4,3.8,5.0,7.4,11.6
Ib(A);2.4,3.6,5.2,7.5,11.6
I(A);2.4,3.7,5.1,7.5,11.6
logd!(mm);-0.15,-0.11,-0.06,0.02,0.06
logI1;0.38,0.57,0.71,0.87,1.06

(vii)|Slope(s)
=change in logI/change in logd
=(0.87-0.57)/(0.02-(-0.11))
=0.3/0.13=2.3A

(vii)
-I will ensure the circuit is open when no readings
are not taken
-i will ensure tight connection

bi)
diameter(d)=1.09mm

bii)
R=eL/A
R=(5.0*10^-2*0.01)/(pie/4)*(0.001)^2
R=(5*10^-4)/(0.7855*1*10^-6)
=6.37*10^2ohm
P=I^2R
=10^2*6.37*10^2
=6.37*10^4W
============================

wapbaze.org rocks!!





Related Article


Posted By quadrihatic On 08:33 Tue, 08 Sep 2015

Comments:0 || Views:

Comment
Name




.....................

Please LOGIN or REGISTER To Gain Full Access To This Article


Wapbaze is an Entertainment website that deals in uploding of music tracks of any kind and letting her users download them in Mp3 formats of high quality. Wapbaze.com is the main website, Wapbaze.com/music/ is the folder for latest songs, wapbaze.com/movies/ is for mp4 movies updates so as wapbaze.com/videos/ is for 3gp music videos updates and wapbaze.com/forum/ is for latest gist, news, health and tech updates.