# 2022–2023 NECO Physics Practical Questions and Answers (Complete Solution).

###### 2022– 2023 NECO Physics Practical Questions and Answers (Complete Solution).

Questions and Answers for NECO Physics Practical 2022. Many NECO applicants struggle to accurately respond to the practical physics problems since they don’t comprehend them. I’ll demonstrate the most effective approach for responding to NECO Physics Practical questions so you can achieve a high NECO score on your Physics exam.2022–2023 NECO Igbo Language Exam Questions and Answers (Essay and Objectives)

Before answering any questions, you must be familiar with the NECO Physics Practical grading scheme in order to present your responses in a way that will appeal to the examiner and result in high scores for you.

Keep in mind that each process receives a grade. Therefore, be sure to follow all the steps in order to report and present your actual results.And do not forget to remember that the units are very important.neco-physics-practical/

Three sections and general physics questions will make up the Physics Practical question paper, and they are as follows:

Optics
Electricity
Mechanics
You will be required to conduct an experiment, gather data, tabulate your results, create a graph, describe any safety measures you took, and record any observations.

The NECO Physics Specimen that was supplied to your school will be somewhat similar to what you see.

Note: To get correct results, make sure to prevent parallax error when taking your readings, and don’t forget to select lines of best fit when plotting the graph. The entry of every point into the line is not required.

Practical Physics NECO Exam Questions and Solutions
Note: During the NECO Physics Practical test, the 2022 NECO Practical Physics solutions (expo) will be released here.
Answers (expo) for the NECO Physics Practical test will be released here. To be informed when the answers are uploaded, keep checking and refreshing this page. Remember to refresh this page to view the solutions.

No 1

No 3

Scale of graph:

Y – 2cm rep 0.2 unit

Y – 2cm rep 0.1 unit

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The questions below are for practice, not the 2022 Physics Practical questions.

1(a)

Two retort stands, two meter rules, lengths of thread, and other necessary tools are given to you.  (i) Arrange the equipment as shown above, making sure that the strings are always 10 cm away from either end of the rule.

(ii) Measure and record the length L = 80cm of the two strings.

(iii) Hold ends of the rule and displaces the rule slightly, then release so that it oscillates about a vertical axis through its centre.

(iv) Determine and record the time t for 10 complete oscillations. (v) Determine the period T of oscillations.

(vi) Evaluate log T and log L. (vii) Repeat the procedure for four other values of L = 70cm, 60cm, 50cm, and 40cm.

(ix) Plot a graph with log T on the vertical axis and log L on the horizontal axis.

(x) Determine the slope, s and the intercept, e on the vertical axis, of the graph.

(xi) State two precautions taken to ensure accurate results.

(b)(i) Define simple harmonic motion

(ii) Determine the value of L corresponding to t = 12s from the graph in 1 (a).

2(a) You are provided with a beaker, a thermometer, a stirrer, stop watch/clock, measuring cylinder, table salt, water and other necessary materials.

(i). Measure 200cm3 of water into the beaker.

(ii). Heat the water until it boils steadily for about 2 minutes

(iii). Read and record the boiling point bo.

(iv). Add table salt of mass M = 10.0g to the boiling water and stir continuously until another boiling point bi is attained.

(v). Read and Record bi.

(vi). Evaluate θi = (bi – bo )

(vii) Using the same mixture, repeat the procedure four more times by adding 10.0g of salt each times to give the cumulative mass Mi of salt as 20g. 30g. 40g. and 50g.

(viii) in each case, allow the mixture to boil steadily for at least 2 minutes then read and record the boiling point bi.

(x). Plot a graph with Mion the vertical axis and θi on the horizontal axis.

(xi). Determine the slope, s, of the graph.

(xii). State two precautions taken to ensure accurate results.

(xiii). Define the boiling points of a liquid

(xiv). What effect do impurities have on the boiling point of a liquid?

3(a) You are provided with cells, a potentionmeter, an ammeter, a voltmeter, a bulb, a key, a jockey and other necessary materials.

(i) Measure and record the e.m.f. E of the battery

(ii) Set up a circuit as shown in the diagram above.

(iii) Close the key K and use the jockey to make a firm contact at J on the potentiometer wire such that PJ = x = 10cm.

(iv) Take and record the voltmeter reading V and the corresponding ammeter reading I.

(v) Evaluate the log V and log I.

(vi) Repeat the procedure for five values of x = 20cm, 30cm, 40cm, 50cm, and 60cm,

(viii) Plot a graph with log I on the vertical axis, and log  V on the horizontal axis.

(ix) Determine the slope s, of the graph.

(x) Determine the intercept c, on the vertical axis.

(xi) State two precautions taken to ensure accurate results.

(b)(i) How is the brightness of the bulb affected as x increases? Give a reason for your answer.

(ii) List two electrical devices whose actions do not obey Ohm’s law.

1(a)(iii) Table of reading

S/N L(cm) L(m) T1(s) T2(s) t(mean) T = t/n Log T Log L
1 80 0.8 11.1 11.2 11.15 1.12 0.05 -0.10
2 70 0.7 10.5 10.5 10.50 1.05 0.02 -0.15
3 60 0.6 9.8 9.7 9.75 0.98 -0.01 -0.22
4 50 0.5 8.7 8.7 8.70 0.87 -0.06 -0.30
5 40 0.4 7.7 7.7 7.70 0.77 -0.11 -0.40
(x)

Slope = ΔlogT/ΔlogL = LogT2 – LogT1/LogL2 – LogL1 = 0.098-(0.10)/0.00 – (-0.38)

= 0.098 + 0.10/0.00 + 0.38 = 0.198/0.38 = 0.52

The intercept, C on the vertical axis = 0.99

(I) I ensured the strong tightening of strings.

(II) I avoided parallax error on metre rule

(III) I ensured smooth and regular oscillation in a horizontal plane.

(b)(i) The motion of a body whose acceleration is always directed towards, a fixed point and is directly proportional to the displacement from the fixed point is known as the simple harmonic motion.

(ii) T = t/n = 12/10 = 1.2s

;log 1.2 = 0.079

The value of LogL = 0.035 = 0.04

L = 1.1

GRAPH

bo = 98oC

S/N m(g) bi(oC) θi = (bi-bo)
1 10 100 2.0
2 20 102 4.0
3 30 104 6.0
4 40 106 8.0
5 50 108 10.0
(xi) Slope = Δmi/Δθi = mi2 – mi1/θ2 – θ1 = 50-5/10-1.0 =  45/9 = 5

(I) I ensured that the water was stirred gently

(II) I avoided parallax error on the thermometer and stopwatch; (III) I ensure i avoided zero error on stop watch.

(b) (i) This is the temperature of a liquid at which is saturated vapour pressure equals the external atmospheric pressure.

(ii) impurities raise the boiling point of a liquid.

GRAPH

S/N I(cm) I(A) V(v) Log1 LogV
1 10.0 0.06 0.20 -1.22 -0.70
2 20.0 0.12 0.35 -0.92 -0.50
3 30.0 0.15 0.45 -0.82 -0.35
4 40.0 0.18 0.50 -0.75 -0.30
5 50.0 0.24 0.65 -0.62 -0.19
6 60.0 0.27 0.80 -0.57 -0.09
(ix)

Slope = ΔlogI/ΔlogV = logI2 – logI1/logV2 – logV1 = -0.28 – (-1.22)/0.1 – (-0.7)

= -0.28 + 1.22/0.1 + 0.7 = 0.94/0.8 = 1.175

(x) the intercept on the vertical axis = -04

(xi) (I) I opened tight terminals;

(II) I ensured i opened key when reading was not taken

(b)(i) Brightness of the bulb increases

Reason: Voltage across and current through the bulb increases

(ii) (a) Diode; (b) Transistor; (c) Filament bulb (d) Capacitor

GRAPH