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2016/2017 WAEC PHYSICS
PRACTICAL QUESTIONS AND
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(3a)
TABULATE
S/N|E(v)|V(v)|I(A)|V^-1(v^-1)|I^-1(A^-1)
1 |1.50|0.80|0.40| 1.250 |2.500
2 |3.00|1.40|0.70| 0.714 |1.429
3 |4.50|2.00|1.00| 0.500 |1.000
4 |6.00|2.50|1.20| 0.400 |0.833
5 |7.50|3.20|1.50| 0.313 |0.667
Precautions:
-I tightened all the wires tightly together
-I ensured clean terminals
-I avoided zero error on the ammeter used
(3bi)
-By using electric cells
-By using electrostatic method
(3bii)
For parallel connection=1/R=1/R+1/R
2Rt=R
Rt=R/2ohm
Total:(R/2)+2
4:(R/2)+2
4:(R+4)/2
8=R+4
8-4=R
R=4ohm
=========
(1i)
Centre of gravity =50.5
TABULATE
S/N|A(cm)| B(cm)
1 |10.0 | 51.90
2 |15.0 | 53.50
3 |20.0 | 53.80
4 |25.0 | 54.90
5 |30.0 | 55.80
1)
S/N: 1 , 2 , 3 , 4 , 5 , 6
V(cm): 10.00 , 15.00 , 20.00 , 25.00 ,
30.00 , 35.00
U(cm): 47.00 , 48.00 , 50.00 , 51.50 ,
53.00 , 54.00
1a) Slope = Change in Y/Change in X
= Y2 – Y1 / X2 – X1
= 51.50 – 50.00/25.00 – 20.00
= 1.50/5.00
= 0.30
Ki = (1 – 2S / S)100
= (1 – 2 x 0.30 / 0.3)100
= 1.33
K2 = 2C/S – 160
= 2×44.50/0.3 – 160
= 136.67
1x)
* I ensure that I avoides paralax error
when taking from the meter rule
* I ensure that I avoided drought to
prevent swingling of the mass
1bi)
The condition under which rigid body
remains in equilibrum when acted upon
the three non parallel coplanner forces are
I) The force must be corrected ie they
must meet at point
II) The resultant force must be equal to
Zero
III) The force can be represented in
magnitude and direction by sides of a
triangular.
No1 GRAPH


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(1xii)
-I avoided the effect of draught during the
experiment
-I avoided error due to parallax on the
metre rule
-I balanced the metre rule horizontally on
the knife edge before taking my readings
(1bi)
Moment of a force about a point is the
product of the force and its perpendicular
distance from the point to the line of
action of the force. i.e moment=force*time
and its unit is Nm
(1bii)
-Sum of forces acting in one direction
must equal to the forces acting in another
direction.
-The algebraic sum of moment acting
about a point must be equal to zero

Thank's for read our article WAEC 2016/2017 (PHYSICS PRACTICAL) QUESTIONS AND ANSWERS NOW READY
Created at 2016-04-06 09:58:51
Tags: 2016 , 2017 , answers , physics , PRACTICAL , questions , Waec

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