2021 NECO Physics Past Questions

An electron of charge a = 1.6 × 10-19C is situated in a uniform electric field of intensity 2.4 × 105 V m-1. What is the force on the electron?

1. A.1.60 × 10-19N✓ Correct
2. B.3.84 × 1019N
3. C.1.92 × 10-14N
4. D.3.84 × 10-14N
5. E.7.68 × 10-14N

A body executing simple harmonic motion has an angular speed of 2π radians. Its period of oscillation is (π 3.14).

1. A.0.05s
2. B.1.00s✓ Correct
3. C.2.00s
4. D.3.14s
5. E.6.28s

The structure in cell concerned with the synthesis of proteins is the

1. A.endoplasm reticulum
2. B.ribosome
3. C.nucleus✓ Correct
4. D.plasma membrane
5. E.golgi apparatus

If a = {x : 1 < x < 9} ; b = {x : 0 < x < 9} ; C = {x : 2 x < 9} and a, b, c U, what are the elements in U?

1. A.U = {-1 < x < 9}✓ Correct
2. B.U = {0 < x < 9}
3. C.U = {1 < x < 9}
4. D.U = {1 < x < 10}
5. E.{2 < x < 10}

Which of the following types of motion is/are exhibited by a cylindrical drum rolling down an incline plane?

1. A.Random and rotational
2. B.Rotational and oscillatory
3. C.Rotational only✓ Correct
4. D.Translations only
5. E.Translational and rotational

J.J. Thomson’s model of the atom was abandoned because

1. A.it could not explain the scattering of alpha particles
2. B.it did not account for the neutron
3. C.it did not account for the size of the atom✓ Correct
4. D.it was known as plum-pudding model
5. E.the model was not similar to any observable phenomena

In the options labelled A to E, all the words except one have the same stress pattern, Choose the one with the different stress pattern. Example: A. behind B. delay C. liver D. relay E. resigns The words in A, B, D and E are all stressed on the second syllable while option C is the only one stressed on the first syllable Therefore the correct answer is C. A.uncertain B.longevity C.felicity D.guarantee E.sabbatical

1. A.A
2. B.B
3. C.C
4. D.D✓ Correct
5. E.E

Plants use Nitrogen in the form of

1. A.ammonia
2. B.ammonium✓ Correct
3. C.nitrates
4. D.nitrites
5. E.urea

Which of the following plant products can be used to confirm that photosynthesis has taken place?

1. A.glucose
2. B.fats
3. C.protein✓ Correct
4. D.starch
5. E.vitamins

If $\frac{t}{L}$ = $\sqrt{(\frac{4\pi^2}{g}})$, what is the value of g when L = 4.5; t = 5 secs

1. A.3.20 ms2
2. B.11.31 ms2
3. C.32.00 ms2
4. D.56.57 ms2✓ Correct
5. E.160.00 ms2