# 2022 NECO PHYSICS PRACTICAL ANSWERS - Verified 2022 NECO EXAM Physics Questions and Answers

##### (ii)i avoided error due to parallax when reading the meter rule

(1bi)
Tabulate.
-Period-
(i)is the time taken on complete one oscillation/circle or to.
(ii)unit is second (s)
(iii)it is Oscillation motion
(iv)it is when a body moves in a to and fro manner

-Frequency of oscillation-
(i)is the number of complete oscillation in one second
(ii) frequency; unit Hertz (Hz)
(iii)it is Rotation motion
(iv)it is when a body turns about an axis through the body

(1bii)
E= 25J
Extension= 6.7x10-²m
Force constant (k) = ?
E= 1/2ke²
2E = ke²
k = 2E/e²
k = 2x 25/(0.067)²
k = 50/0.00449
k = 11135.9Nm-¹
=====================================

2bi) A real image is formed outside the system, where the emerging rays actually cross; such an image can be caught on a screen or piece of film and is the kind of image formed by a slide projector or in a camera.

The image developed by a plane mirror is virtual and laterally inverted.

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

(3)
Tabulate
R(n); 2.0|4.0|6.0|8.0|1.0|

I(A); 0.80|0.64|0.46|0.36|

I^-¹(A^-¹)1.2500|1.5625|2.1739|2.7778|3.3333

(3viii)
Slope s= DI^-²/DR
=3-1/9-2=2/7=0.2857

(3ix)
Intercept C : 0.40

(3x)
K=c/5-2=0.40^²/0.2857=1.4-2=0.6

(3)

(3xi)
(i)I ensured tight connections
(ii) I avoided error due to parallax on the ammeter

(3bi)
(i)Free electrons
(ii)Protons and Electron
(iii)Electrons and ions

(3bii)
I=E/R+r
I=2*2/4+1=4/5=0.8A

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