WAEC 2016 PHYSICS PRACTICAL IS AVAILABLE NOW

1(a)
V(cm)=10.0,15.0,20.0,25.0,30.0,35.0
U(cm)=47.0,48.5,50.0,51.5,53.0,54.5 respectively
Precautions
i I avoided drought to prevent swinging of the mass Q
ii I avoided parallax error in reading the metre rule
iii I avoided that the mass did not rest on the table
(1) b(i) Moment of a force about a point is the product of the force sF and the perpendicular distance from the point to the line of force.
Example opening of door, turning of tap,riding of bicycle.
1 b(ii) (a) The principle of moment states that if a body is in equilibrium the the sum of the clockwise turning moments acting upon it about any point equals the sum of the anticlockwise turning moment about the same point.
(b) The term equilibrium meabs that when a body acted on by several forces and it does not accelerate or rotate, it is said to be at equilibrium.
2bi)Heat Capacity: is the amount of heat required to change its temperature by one degree, and has units of energy per
degree.

(2bii)
Moment of a force about a point: The
moment of a force about a point O is
defined as the vector product (cross
product)
Mo= r × F
where r = xi + yj + zk is the radius
vector (position vector) drawn from O
to the point of
application A of the force F , and F =
Fx + Fy + Fz is the force vector acting
on A.

(3)
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

===============================
COMPLETED
===============================