NECO Physics Practical Questions.<\/h3>\n
QUESTION 1:<\/strong><\/p>\n (a) Diagram<\/p>\n Using the above diagram as a guide, carry out the following instructions. (b) i. State parallelogram law of vector addition. QUESTION 2:<\/strong><\/p>\n (a) Diagram<\/p>\n Use the diagram above as a guide to carry out the following experiment.<\/p>\n i. Trace the outline ABCD of the rectangular glass prism on the drawing paper provided. (b) i. State Snell\u2019s law of refraction. RELATED:<\/strong> NECO PHYSICS QUESTIONS AND ANSWERS<\/a><\/p>\n![\"neco](\"https:\/\/unn-edu.info\/wp-content\/uploads\/2017\/06\/neco-physcis-practical-questions.jpg\")
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\ni. Attach the mass Mo to one end of the thread provided. Fix the other end of the thread to the pulley on the force board. Pass the thread through pulley C.
\nii. Hang the force board vertically. Fix a drawing paper on the board behind the thread.
\niii. Draw a line on the paper along the direction of AC. Locate and mark the mid point B of line AC.
\n(iv)Draw a normal to AC at B.
\nv. By means of a loop of thread, suspend mass M = 70 g from AC. Adjust the position of the loop so that the line of action of the weight of M lies along with BP, the normal to AC.
\nvi. Ensure that M and Mo hand off the force board. Trace the paths AO, OC, and OP of the thread.
\nvii. Measure and record y = BO. Also, measure and record d = AO.
\nviii. Evaluate 1 = y \/d
\nix. Repeat the procedure for other values of M = 100, 120, 150 and 170g.
\nx. Tabulate your readings.
\nxi. Plot a graph with I on the vertical axis and M on the horizontal axis.
\nxii. Determine the slope, s, of the graph.
\nxiii. State two precautions taken to ensure accurate results.
\n(attach your traces to your answer booklet.)<\/p>\n
\nii. State the conditions necessary for a body to be in equilibrium when acted upon by a number
\nof parallel coplanar forces.<\/p>\n![\"physics-practical-waec-alternative-a\"](\"https:\/\/unn-edu.info\/wp-content\/uploads\/2017\/09\/physics-practical-waec-alternative-a.jpg\")
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\nii. Remove the prism. Select a point N on AB such that AN is about one quarter of AB.
\niii. Draw the normal LNM.\u00a0 Also, draw a line RN to make an angle \u03b8 = 75o with AB at N
\niv. Fix two pins at P1 and P2 on line RN. Replace the prism on its outline.
\nv. Fix two other pins at P3 and P4 such that they appear to be in a straight line with the images of the pins at P1 and P2 when viewed through the prism from side DC.
\nvi. Remove the prism and the pins at P3 and P4 Draw a line to join P3 and P4.
\nvii. Produce line P4P3 to meet the line DC at O. Draw a line to join NO.
\nviii. Measure and record the values of MO and NO.
\nix. Evaluate \u0444 = \u00a0and cos \u03b8.
\nx. Repeat the procedure for four other values of \u03b8 – 65o, 55o, 45o, and 35o. In each case, evaluate \u0444 and cos \u03b8
\nxi. Tabulate your reading
\nxii. Plot a graph with cos \u03b8 on the vertical axis and \u0444 on the horizontal axis.
\nxiii. Determine the slope, s, of the graph.
\nxiv. Sate two precautions that are taken to ensure accurate results.
\n(Attach your traces to your answer booklet)<\/p>\n
\nii. Calculate the critical angle for the glass prism used in the experiment above if its refractive index is 1.5.<\/p>\n
![\"neco](\"https:\/\/unn-edu.info\/wp-content\/uploads\/2017\/06\/neco-physics-practical-question-326x206.jpg\")
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