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# WAEC Physics Questions and Answers for 2023/2024

Welcome to 2023 WAEC Physics Questions and Answers. You will find WAEC Physics Objective Answers, WAEC Physics Essay 2023, WAEC 2023 Physics and the tips you need to pass your WAEC Physics examination with ease.

## WAEC Physics Objectives And Essay Answers 2023

The 2023 WAEC Physics answers will be posted here today, 23rd May during the exam

1-10: CBAACCAABD
31-40:  CBBABACBBC

No 1

To use dimensional analysis to determine the values of x, y and z, let’s first look at the dimensions of each variable:

F = force

v = velocity

p = density

A = surface area

Using the dimensions of these variables, we can write:

F = [M L T^-2]

v = [L T^-1]

p = [M L^-3]

A = [L^2]

Substituting these dimensions into the given equation, we get:

[M L T^-2] = k [M L^-3] ^x [L T^-1]^y [L^2]^z

Simplifying the right-hand side, we get:

[M L T^-2] = k [M^x L^(-3x+2y+2z) T^(-y)]

Equating the dimensions on both sides, we get:

For mass: 1 = x

For length: 1 = -3x + 2y + 2z

For time: -2 = -y

Solving for x, y, and z, we get:

x = 1

y = 2

z = 0

Therefore, the values of x, y, and z are 1, 2, and 0 respectively.

(4)
TABULATE:
(PICK ANY THREE)
Geostationary satellites:
(i) Orbit the Earth directly above the equator in a geosynchronous orbit
(ii) It has an inclination of 0 degrees
(iii) Its coverage are limited to a specific longitude
(iv) They observe the Earth from a fixed position, providing a continuous view of a specific region
(v) They collect data for meteorological observations, weather forecasting, and telecommunications
(vi) They are positioned at an altitude of approximately 35,786 kilometers
(vii) They provide a continuous stream of data and observations for a specific region, allowing for real-time

Polar satellites:
(i) Orbit the Earth in a polar orbit
(ii) It has a high inclination angle (usually around 90 degrees)
(iii) They cover the entire Earth’s surface over time.
(iv) They observe the Earth from a changing perspective as they orbit, resulting in different views of the Earth’s surface with each pass.
(v) They collect data for a wide range of applications, including weather monitoring, climate research, environmental monitoring, and scientific research.
(vi) They operate at lower altitudes, typically between 700 and 1,500 kilometers
(vii) They have a lower data refresh rate since they pass over a given area less frequently.

OR

(4)
(PICK ANY THREE)
(i) Geostationary satellites orbit the Earth directly above the equator in a geosynchronous orbit. They remain fixed relative to a specific point on the Earth’s surface WHILE Polar satellites orbit the Earth in a polar orbit, passing over or near the North and South poles on each orbit.

(ii) Geostationary satellites have an inclination of 0 degrees, meaning their orbital plane aligns with the equatorial plane WHILE Polar satellites have a high inclination angle (usually around 90 degrees) to achieve polar orbits.

(iii) Geostationary satellites provide coverage over a large portion of the Earth’s surface (typically one-third to half) but are limited to a specific longitude range WHILE Polar satellites provide global coverage, as they pass over or near the poles on each orbit, covering the entire Earth’s surface over time.

(iv) Geostationary satellites observe the Earth from a fixed position, providing a continuous view of a specific region WHILE Polar satellites observe the Earth from a changing perspective as they orbit, resulting in different views of the Earth’s surface with each pass.

(v) Geostationary satellites primarily collect data for meteorological observations, weather forecasting, and telecommunications WHILE Polar satellites collect data for a wide range of applications, including weather monitoring, climate research, environmental monitoring, and scientific research.

(vi) Geostationary satellites are positioned at an altitude of approximately 35,786 kilometers (22,236 miles) above the Earth’s surface WHILE Polar satellites generally operate at lower altitudes, typically between 700 and 1,500 kilometers (435 to 932 miles.

(vii) Geostationary satellites provide a continuous stream of data and observations for a specific region, allowing for real-time monitoring WHILE Polar satellites have a lower data refresh rate since they pass over a given area less frequently. However, they provide a broader coverage over time.

No (5)

(a) The kinetic theory states that all matter is made up of tiny particles (atoms or molecules) that are in constant motion. Diffusion is the process by which these particles move from an area of high concentration to an area of low concentration, due to their random motion. This occurs because the particles collide with each other and bounce off in different directions, spreading out over time. The rate of diffusion depends on factors such as temperature, pressure, and the size and shape of the particles. In general, diffusion is faster at higher temperatures and lower pressures, and for smaller particles that can move more easily through a medium.

5(b)

(i) One phenomenon that demonstrates that light behaves as a wave is interference, where two or more waves can combine to form a new wave with a different amplitude and wavelength.

(ii) One phenomenon that demonstrates that light behaves as a particle is the photoelectric effect, where light can knock electrons off a metal surface, indicating that light has energy in discrete packets called photons.

No (6)

6. (a) One difference between an intrinsic and an extrinsic semiconductor is that intrinsic semiconductors are pure materials (such as silicon or germanium) with no intentional impurities added, while extrinsic semiconductors have small amounts of impurities (dopants) intentionally added to alter their electrical properties.

(b) Two reasons why optical fibers are preferred to copper cables in telecommunications are:

– Optical fibers have much higher bandwidth and can transmit data at much higher speeds over longer distances without signal degradation.

– Optical fibers are immune to electromagnetic interference and do not generate electromagnetic fields, making them more secure and reliable for transmitting sensitive information.

(7a)
(PICK ANY ONE)
Fiber optics refers to a technology that utilizes thin, flexible strands of glass or plastic called optical fibers to transmit information in the form of light pulses.

OR

Fiber optics refers to the technology that uses thin strands of glass or plastic fibers to transmit data and information in the form of light signals

OR

Fiber optics is a method of transmitting light signals through optical fibers for the purpose of communication or data transmission.

(7b)
(PICK ANY TWO)
(i) Optical fibers have a much higher bandwidth compared to copper cables.
(ii) Optical fibers can transmit signals over much longer distances without experiencing significant signal degradation unlike copper cables which are limited in their transmission.
(iii) Optical fibers are immune to Electromagnetic Interference while copper cables are susceptible to interference
(iv) Optical fibers offer improved security for data transmission whereas copper cables are vulnerable to eavesdropping or unauthorized access
(v) Optical fibers are much thinner and lighter than copper cables, making them easier to install and handle.

No (8)

No (9)

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The questions provided below are WAEC Physics questions and answers for practice.

Scroll to the bottom for today’s Physics answers.

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

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 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

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

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 2023 (EXPO)

The above questions are not exactly 2023 WAEC Physics questions and answers but likely WAEC Physics repeated questions and answers.

These questions are for practice. The 2023 WAEC Physics expo will be posted here soon.

### Tips to Pass WAEC 2023 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 2023, you must develop a positive mindset toward 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 2023 Physics on your own.

Have the mentality, “If others passed WAEC 2023 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 2023 Physics this time around. Sit for Physics 2023/2023 with a refined mindset. Nothing will make you fail WAEC 2023. 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 2023 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 WAEC 2023, the next thing you should do is set targets. Write down the type of grades you want in WAEC 2023. 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 to get the WAEC 2023 Physics recommended textbooks. Normally, the West African Examination Council recommends books for the examination.

But apart from WAEC 2023 Literature in English where certain novels are compulsory, you are free to use any good textbook to prepare for WAEC 2023 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 Physics Past Questions:

This is a very good plan. Since WAEC 2023 and WAEC 2023 are of the same standard, you could use the same past questions to study for both.

If you are confused about how to get WAEC 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 2023 Physics.

#### 6. Start Preparing for WAEC 2023 :

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 are good for you; you will pass well on WAEC 2023 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 2023?”. 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 a while, 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. Once you work more than necessary, you are not gaining anything.

#### 11. Revise your Previous studies

Doing constant practice is a good idea for WAEC 2023. 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 2023 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.

If you have found this article helpful, feel free to share it with friends by clicking the Facebook share icon or any of the social media share icons below.

Last Updated on June 18, 2023 by Admin

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