NECO 2021 Physics Practical Questions and Answers Is Out

 NECO 2021 PHYSICS PRACTICAL ANSWERS IS OUT

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(1)

M/g; 50.0|70.0|90.0|110.0|130.0|

t,/s; 5.10|9.10|10.30|12.20|13.70|

t(s); 0.255•0.455|0.515|0.610|0.685|

T²(s²)0.065|0.207|0.265|0.372|0.469|

(1ix)

Graph.

https://i.imgur.com/A1MEgbq.jpg

(1x)

Slope; s DM/DT²

=178-50/0.7-0.07

=128/0.63

=203.1746

=203.17g|s²

(1xii)

(i)i avoided drought by closing the window

(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

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(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)

Graph.

https://i.imgur.com/UrFy4Rb.jpg

(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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