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2015 Gce Physics Now Posted At Nairaland by wisetalent1: 10:45am On Sep 10, 2015 |
(1a)
Tabulate:
Under s/n: 1,2,3,4,5
Under M(n): 140,120,110,84,66
Under tita(o): 24,32,38,51,62
Under Sin tita: 0.4067, 0.5299,0.6156, 0.7771,0.8829.
Note that 1cm =20N (1aviii)
-I would ensure that the meter
rules balanced before the
readings.
-I would avoid error due to
parallax (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
(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 (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
(3bi) diameter(d)=1.09mm
(ii)
R=eL/A
R5.0*10^-2*0.01)/(pie/4)*
(0.001)^2
R5*10^-4)/(0.7855*1*10^-6) =6.37*10^2ohm
P=I^2R
=10^2*6.37*10^2
=6.37*10^4W (3avi)
|Slope(s)=change in logI/
change in logd
0.87-0.57)/(0.02-(-0.11))
=0.3/0.13=2.3A (3avii)
-I will ensure the circuit is open
when no readings are not
taken
-i will ensure tight connection
(3bi) diameter(d)=1.09mm
(ii)
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 Visit www.classicbiz.tk for more |
(1) (Reply)
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