2019 NECO PHYSICS PRACTICAL EXPO

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NECO PHYSICS PRACTICAL

(1vii)
(PICK TWO)
(i)I ensured mass did not tourch/
rest on the table
(ii)I avoided error due to parallax
on metre rule
(iii)I noted zero error on metre
rule
(iv)I avoided draught

(1bi)
The principal of moments state
that if a body is in
equilibrium,then the sum of the
clockwise moments about any
point on the body is equal to the
sum of the anticlockwise
moments about the same point
(1bii)
Clockwise moment =Anti
clockwise moment
10×5 = RB × 7
RB= 10×5/7
RB=50/7
RB=7.14
RA + RB=10
RA+7.14 =10
RA=10 - 7.14 =2.86N

_Q1.
determine the slope of the graph
and the intercept c
- evaluate k1 = k1 = 4π2/s and k2
=
(Xiii)- state any two of the
following precautions
- Avoided conical oscillations
- Ensured firm suspension of
pendulum
- Ensured reading is repeated
(shown on the table
- Avoided draught
-Corrected/noted for zero error
of metre rule/ stop match/clock
- Avoided parallax error in
reading metre rule/ stop clock
(b) (i) The period of oscillation of
a body is the time taken for the
body to make one complete to
and from movement
(ii) When a body is falling under
its weight (alone), the rate of
increase of its velocity with time
(as a result of the earth’s
gravitational pull) is the
acceleration of free fall due to gravity


No2a........


2bi)
A couple is a pair of forces, equal in magnitude, oppositely directed, and displaced by perpendicular distance or moment.


(2xiv)
- I ensure both the object and the pin were in straight lines so as to avoid error due to parallax
- I ensured that all the pins were vertically placed

=============
=============

3av)
E=3.0v

(3avii)
Tabulate

Under L(cm): 20.0; 30.0; 40.0; 50.0; 60.0; 70.0;
Under I(A): 0.70; 0.60; 0.55; 0.50; 0.45; 0.40;
Under X=E/I(Ohms): 4.2857; 5.0000; 5.4545; 6.0000; 6.6667; 7.5000;

(3aix)
slope = ΔL/ΔX = 66 - 12/7 - 4
= 54/3 = 18cm

Intercept, C

(3ax)
K = 4.9×10^-7
      K = 4.9×10^-7 × 18
      K = 8.82×10^-6cm/ohm

(3axi)
-I ensured tight connections.
-I avoided error due to parallax on the ammeter.

(3bi)
keep the top or terminals clean.
Do not tighten or remove cables while charging or discharging.

(3bii)
Using ohm's law
R = V/I = 3.5/0.25 = 14ohm
[6/10, 11:27] +234 902 406 9051: (3a)
(v) E=3.0v
(vii) Tabulate

Under L(cm): 20.0; 30.0; 40.0; 50.0; 60.0; 70.0;
Under I(A): 0.70; 0.60; 0.55; 0.50; 0.45; 0.40;
Under X=E/I(Ohms): 4.2857; 5.0000; 5.4545; 6.0000; 6.6667; 7.5000;

_________________________________

(No3)
<Tabulate>
K,M,F
E=3.0v
L(cm).|20|30|40|50|60|70|
I(A). |1.30|1.20|1.10|1.00|0.90|0.95|
X=E/I(V/A).
|2.31|2.50|2.73|3.00|3.33|3.16

*Experiment 3*
No 3axi)
Pick two only


*_Precautions_*

•I ensured clean terminals through out the circuit

•I ensured tight connection

•I avoided error due to parallax when taking readings from the voltmeter

•I ensured I removed the keys when readings were not being taken

•Zero error noted and corrected on the voltmeter

WE ARE NOW DONE WITH WAEC EXAM 

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