Neco 2021 Physics Practical Answers
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1
_2021 NECO PHYSICS-PRACTICAL_
(1xii)
(i)i avoided draught.
(ii)i avoided error due to parallax when reading the meter rule.
(iii) I ensured steady oscillation.
(iv) I avoided zero error to the stop clock.
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2
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(1x)
Slope; s DM/DT²
=178-50/0.7-0.07
=128/0.63
=203.1746
=203.17g|s²
(1xii)
(i)i avoided draught 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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(2bi)
The image produced by a simple camera is inverted while image on a mirror is erect.
(2bii)i)
v = 2u
v = 2 x 50
v = 100cm
(2bii)ii)
M = v/u
M = 50/50
M = 1
NUMBER 2 ISN'T COMPULSORY
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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
3
(3xi)
(i)I ensured tightened connections.
(ii) I avoided error due to parallax on the ammeter.
(iii) I removed key when reading was not taken
(iv) Avoidance of repeated reading from table
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