WAEC Physics Questions and Answers for 2020/2021

Welcome to 2020 WAEC Physics questions and Answers. You will find WAEC Physics Objective Answers, WAEC Physics Essay 2020, WAEC 2020 Physics and the tips you need to pass your waec Physics examination at ease.

WAEC Physics Objectives And Essay Answers 2020

The questions provided below are WAEC randomly repeated Physics Past questions

1. The instrument that measures the relative density of light is
A. thermometer
B. hydrometer
C. spring balance
D. beaker

2. What is the speed of a body vibrating at 50 cyclic per second
A. 100 πrads−1−1
B. 200 πrads−1−1
C. 50 πrads−1−1
D. 400 πrads−1−1

3. The action of blotting paper on ink is due to
A. diffusion
B. osmosis
C. capillarity
D. surface tension

4. When two mirrors are placed at an angle of 900 to each other, how many images will be formed when an object is placed in front of the mirrors
A. 5
B. 4
C. 3
D. 2

5. If silicon is doped with phosphorus, what type of semiconductor material will be formed?
A. Zener material
B. P-n junction
C. n-type
D. p-type

6. A car of mass 800kg attains a speed of 25m/s in 20 secs. The power developed in the engine is
A. 1 . 25 x 104 W
B. 2 . 50 x 104 W
C. 1 . 25 x 106W
D. 2 . 50 x 106 W

7. When the brakes in a car are applied, the frictional force force on the tyres is
A. is a disadvantage because it is in the direction of the motion of the car
B. is a disadvantage because it is in the opposite direction of the motion of the car
C. is an advantage because it is in the direction of the motion of the car
D. is an advantage because it is in the opposite direction of the motion of the car

8. If the stress on a wire is 107NM2 and the wire is stretched from its original length of 10.00 cm to 10.05 cm. The young’s modulus of the wire is
A. 5. 0 x 104 Nm-2
B. 5. 0 x 105 Nm-2
C. 2. 0 x 108 Nm-2
D. 2. 0 x 109 Nm-2

9. A solid weigh 10.00 N in air, 6 N when fully immersed in water and 7. 0 N when fully immersed in a liquid X. Calculate the relative density of the liquid, X.
A. 5/3
B. 4/3
C. 3/4
D. 7/10

See: WAEC Chemistry Questions and Answers

10. When temperature of a liquid increases, its surface tension
A. Decreases
B. Increases
C. Remain Constant
D. Increases then decreases

11. A gas at a volume of V0 in a container at pressure P0 is compressed to one-fifth of its volume. What will be its pressure if the magnitude of its original temperature T is constant?
A. P0/5
B. 4P0/5
C. P0
D. 5P0

12. A piece of substance of specific head capacity 450JKg-1K-1 falls through a vertical distance of 20m from rest. Calculate the rise in temperature of the substance on hitting the ground when all its energies are converted into heat. [g = 10ms-2]
A. 2/9°C
B. 4/9°C
C. 9/4°C
D. 9/2°C

13. I. A liquid boils when its saturated vapour pressure is equal to the external pressure
II. Dissolved substances in pure water lead to increase in the boiling point.
III. When the external pressure is increased, the boiling point increases.
IV. Dissolved substances in pure water decrease the boiling point.

14. Which combination of the above are peculiarities of the boiling point of a liquid?
A. I, II and III
B. I, II, III and IV
C. I, II and IV
D. II, III and IV

15. The temperature gradient across a copper rod of thickness 0.02m, maintained at two temperature junctions of 20°C and 80°C respectively is
A. 3.0 x 102Km-1
B. 3.0 x 103Km-1
C. 5.0 x 103Km-1
D. 3.0 x 104Km-1

16. Calculate the mass of ice that would melt when 2kg of copper is quickly transferred from boiling water to a block of ice without heat loss;
Specific heat capacity of copper = 400JKg-1K-1
Latent heat of fusion of ice = 3.3 x 105JKg-1
A. 8/33kg
B. 33/80kg
C. 80/33kg
D. 33/8kg

17. A semiconductor diode is used in rectifying alternating current into direct current mainly because it
A. allows current to flow in either direction
B. is non-linear
C. offers a high input resistance
D. allows current to flow only in one direction

18. if ∆x is the uncertainty in the measurement of the position of a particle along the x-axis and ∆Px is the uncertainty in the measurement of the linear momentum along the x-axis, then the uncertainty principle relation is given as
A. ∆x ∆Px ≥ h
B. ∆x ∆Px = 0
C. ∆x ∆Px < h
D. ∆x ∆Px = ∞

19. When a ship sails from salt water into fresh water, the fraction of its volume above the water surface will
A. increase
B. decrease
C. remain the same
D. increase then decrease

20. I. Its velocity is constant
II. No work is done on the body
III. It has constant acceleration directed away from the centre
IV. The centripetal force is directed towards the centre

PAST ESSAY ANSWERS

1)
Velocity of projection U_p =10m/s
T= sqr root 2h/g Where H=1
G=10
T=sqr root 2*1/10
=sqr root 0.2
=0.447s
V=UsinTita + gt V=10sin90 + 10*0.447
V=10 +4.45
V=14.5m/s
=================

(2)
(i) The position of the ion of the atm of the element in the
electrochemical(activity)series.
(ii) the nature of the electrode.
(iii) the concentration of the electrolyte
====================================
3)
l=6.5m
d=3.0mm=0.003m
e=0.20mm=0.0002m
F=60N
stress=F/A
A=pie*D^2/4
=3.142*0.003^2/4
=3.142*9*10^-6/4
=7.065*10^-6/4m^2
stress=60/7.065*10^-6
=8.49*N/m^2


(7)
Doping of semiconductor increases the number of holes and electrons in
the semiconductor, thereby making it impure which makes it to be useful
or active.

WAEC Physics Essay and Objective 2020 (EXPO)

The above questions are not exactly 2020 WAEC Physics questions and answers but likely WAEC Physics repeated questions and answers.

These questions are for practice. The 2020 WAEC Physics expo will be posted on this page 30 minutes before the WAEC Physics examination starts. Keep checking and refreshing this page for the answers.

WAEC Physics Questions and Answers 2020 Loading…

Tips to Pass WAEC 2020 Physics Questions

1. Be Positive in Your Thought

It is obvious that until your mindset is positive, your life will not be positive. As you prepare for WAEC 2020, you must develop a positive mindset towards your fate. Don’t say, “WAEC Physics is very hard I don’t know whether I will pass” and don’t believe anyone that says you cannot pass WAEC 2020 Physics on your own.

Have the mentality, “If others passed WAEC 2020 Physics in the past, then I will be like them. Refuse to be identified with failure or those that failed in the past.

Even if this year’s WAEC Exam is not your first time, it doesn’t mean that you cannot pass WAEC 2020 Physics this time around. Sit for maths 2020/2021 will a refined mindset. Nothing will make you fail WAEC 2020. Until your mindset is positive, your life will not be positive.

2. Be Mindful of the Friends You Keep

If you are really serious about passing WAEC 2020 Physics, try and avoid bad companies. They will discourage and engage you in activities that will not enhance your success. Remember that their mindset may not correspond to yours.

3. Target High

If you have made up your mind to pass neco 2020, the next thing you should do is set targets. Write down the type of grades you want in Neco 2020. If you want all As, zero Fs and Zero Es then you should start planning it now.

Make sure you create a timetable and master plan to achieve your set goals. Remember, it takes nothing to dream but it takes everything to focus on your dream.

4. Study Using the Recommended Waec Physics Textbooks

One of your plans should be getting the WAEC 2020 Physics recommended textbooks. Normally, the West African Examination Council recommends books for the examination.

But apart from WAEC 2020 literature in English where certain novels are compulsory, you are free to use any good textbook to prepare for WAEC 2020 Physics exam. Some topics are more difficult to understand.

If you have any topic you are finding difficult to understand, then get another textbook that will make things simple for you.

5. Study WAEC Physic Past Questions:

This is a very good plan. Since NECO 2020 and WAEC 2020 are of the same standard, you could use the same past questions to study for both. If you are confused about how to get neco or waec past questions. They are sold in good bookshops around.

It is possible that the school where you registered could offer to give you some current past questions that will help you in WAEC 2020 Physics.

6. Start Preparing for WAEC 2020 :

Stop wasting your time. Now that you have gotten textbooks and past questions, the next thing is to begin your reading. Early reading and practice is good for you; you will pass well on WAEC 2020 Physics

7. Solve and try to understand every example and exercise you see in textbooks

It is very unfortunate that Secondary school students are fond of skipping exercises and even examples while studying textbooks.

They loved notebooks so much that they could ask, “can I read my Physics notebook and pass WAEC 2020?”. Don’t be scared of attempting exercises; they are there to help you. Face it and overcome it!

8. Test yourself after a study by reading WAEC physics past question

This is a good practice. Once in awhile, answer full one year Physics past questions on your own without checking the answers. Then mark to see your score. This will help you in many aspects.

9. Practise Regularly

Don’t get discouraged when certain topics are annoying, keep on practicing until you master everything. Never give up and never say never. Keep on keeping on….

10. Create Break Time

Create time for yourself where you play and ease off stresses. Do not overwork yourself; it can make you waste time unnecessarily. One you work more than necessary, you are not gaining anything.

11. Revise your Previous studies

Doing constant practice is a good idea for WAEC 2020. Don’t just read a topic and forget about it. Revision helps; always go through what you have read over and over again.

12. You can Attend WAEC Preparatory Classes

Attending regular classes makes it easier for you to do well in WAEC 2020 Physics. Do not feel too big to learn from teachers no matter how small or dull they may be. You can also attend other classes that may help outside your normal classes.

WAEC Physics Answers to Questions 2020 loading….

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