Home EXAMS EXPO: WAEC Physics Questions and Answers 2022/2023 – Theory Objectives (OBJ) Expo

# EXPO: WAEC Physics Questions and Answers 2022/2023 – Theory Objectives (OBJ) Expo

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### EXPO: WAEC Physics Questions and Answers 2022/2023 – Theory Objectives (OBJ).

WAEC Physics Questions and Answers: This WAEC 2022 Physics expo question and answer is free for all candidates writing this year exams. If you are among those writing 2022 WAEC Examination, Feel free to expect free answer here.

The West African Examinations Council is an examination that is for all the west African country (Ghana, Nigeria, Sierra Leone, Liberia, and Gambia).

WAEC Physics Questions and Answers: Candidate that applied for the WAEC in any country should BOOKMARK this page for all and latest WAEC Physics exam expo.

## WAEC Physics Expo Runs for Theory and OBJ – Wednesday › 15th June, 2022

WAEC 2022 PHYSICS PRACTICAL SPECIMEN

QUESTION 1

-Metre rule

-Knife edge

-A piece of string

-A weighing balance

-A weight hanger

– A set of masses, M = (20g, 40g, 60g, 80g and 100g)

QUESTION 2

-Deep transparent vessel filled with water

-Vernier calipers

-Standand Masses, m = (2g, 5g and 10g)

-A piece of string

-Forceps (To be used to pick masses placed inside the boiling tube)

-Source of heating

(a) Test tube or boiling tube of the following dimensions:

Length: at least 14cm

External diameter: 2.5cm

The teacher should:

(b) Use starch to fix a strip of graph sheet marked in centimeters inside the boiling tube or test tube. The 0 centimeter mark of the scale should be at the bottom of the tube.

(c) Place sufficient amount of dry sand or lead shot in the test tube or boiling tube to make it just float, when that is done, pour it into a small polythene and seal it. Push the sealed sand or lead shot to the bottom of the tube.

QUESTION 3

-Jockey

-2 dry cells(1.5v each) connected in series;

-Connecting leads should be provided for the battery

-Ammeter(0 – 2A)

-Potentiometer

-Key/switch

-Standard resistor, R of resistance 2ohms

-Connecting wires

• Physics 2 (Essay) › 08:30 hrs. – 10.00 hrs.
• Physics 1 (Objective) › 10:00 hrs. – 11: 15 hrs.

This is 2022 free WAEC Physics Expo answers 2022 samples for 2022 theory (essay) paper 2 & OBJ (objectives) paper 1 for 2022 WAEC candidates.

With this idea, you will obtain from this material ideas on questions pattern, you will be able to even solve every other question (including the WAEC past questions and answers on physics) by yourself.

The theory section will give you the “showing working” of each of the WAEC Physics essay and theory sample questions and answers for 2022 (i.e paper 2). Study the steps and master them in case you see similar questions during the exam.

## WAEC 2022 Physics OBJ Questions and Answers Samples.

Use the following WAEC 2022 Physics Objective Questions and Answers samples for the OBJ paper 1 for reference.

Kindly Study the entire sample WAEC physics questions 2022 below, and check their correct answer. Proceed to the theory section at the bottom to see how each question is solved.

1. One Joule is Equal to?

1. 103 ergs
2. 106 ergs
3. 107 ergs
4. 105 ergs

Correct Answer is C) 107 ergs

2. Which of these principles does Optical fiber works on?

1. Scattering
2. interference
3. total internal reflection
4. refraction

The correct answer is C) total internal reflection

3. Why is the base of an electric iron usually brightly polished?

1. To Make it smooth and frictionless
2. Make it rust-proof
3. Reduce heat loss by radiation
4. Make it more durable

5. A riffle of mass 15kg fires a bullet of mass 60g with a velocity of 200ms-1. Calculate the recoil velocity of the riffle.

1. 0.8ms-1
2. 200ms-1
3. 0.8ms-1
4. -200ms-1
5. 0.8kgms-2

The correct answer is A. -0.8ms-1

5. Which of this is the correct formula for Kinetic energy?

1. ½ ms2
2. ½ kg2
3. ½ kx2
4. ½ mu2
5. ½ mm2

The correct answer is D. ½ mu2

6. If the efficiency of a machine is 60%, find in joules, the work done by the student using this machine to raise a load of 150kg through a vertical distance of 2.5m (g = 10ms-1)

1. 3534joules
2. 5000joules
3. 2500 joules
4. 6250joules
5. 622joules

The correct answer is D. 6250 Joules

7. Calculate the height from which a body is released from rest if its velocity just before hitting the ground is 30ms-1

1. 15m
2. 45m
3. 60
4. 90m
5. 75m

The correct answer is B. 45m

8. A mango fruit from the top of its tree which is 5m long drops to the ground. How long does it take the mango to reach the ground?

1. 2.0s
2. 3.00s
3. 1.5s
4. 1.0s
5. 0.5s

The correct answer is D. 1.0s

## 2021 WAEC Past Questions and Answers for Physics.

Additionally, the following WAEC past questions and answers on physics objective will help you to get more ideas on how to solve physics WAEC questions.

Also, do well to scroll to the bottom to see how each of these questions is solved to arrive at the answer.

1. The equation PxVyTz = constant is Gay-Lussac’s law if____?

1. x = 0, y = 0 and z = 1
2. x = 1, y = 0 and z = -1
3. x = 1, y = 1 and z = 1
4. x = 0, y= 0 and z = 0
5. x = -1, y = 1 and z = 0

The correct answer is B. x = 1, y = 0 and z = -1

2. Calculate the effort put into a machine whose efficiency is 75% and lifts a load of 1000N, if its velocity ratio is 4.

1. 233.33N
2. 332.33N
3. 322.33N
4. 323.33N
5. 333.33N

The correct answer is E. 333.33N

Theory question: A rocket is burning fuel at the rate of 200gs-1 and ejecting all the gas in one direction at the rate of 400ms-1. What is the maximum weight the rocket can have if it is going to move vertically upwards?

Solving:

Mass of gas per second = 200/1000kgs-1.

Velocity of expulsion = 400ms-1.

Momentum change per second = 200/1000 x 400kgms-2.

From Newton’s second law, we have F =W =200/1000 x 400N

=80N

Recommended:

## Physics Essay and theory sample Questions and Answers for paper 2.

Below are the showing working of the WAEC Physics essay and theory sample questions and answers for 2021 paper 2.

Study the steps and master them in case you see similar questions during the exam.

1. A stationary ball is hit by an average force of 50N for a time range of 0.03sec. Calculate the impulse experienced by the ball.

Solution: impulse (I) = Ft

=5×0.03

=1.5N-sec.

2. Calculate the recoil velocity of a riffle of mass 15kg which fires a bullet of mass 60g with a velocity of 200ms-1.

Mass of the riffle = 15kg, while the mass of the bullet = 60g

The velocity of the bullet = 200ms-1.

Solution.

The momentum before firing is zero

Momentum after firing = 15 x V + 60/100 X 200 = 15v + 12

Since the momentum is conserved, we will have;

15v + 12 =0

v = –12/15 = -0.8ms-1

Question 3. i. What is the width of the image of an object which subtends an angle of 80 at the pinhole of a camera 0.5m long?

ii. How long is the image of the sun on this camera? Take the mean distance of the sun as 1.5 X 1011m, and the diameter of the sun as 1.4 X 109

Solutions

Let the width of the image = h (m)

tan80 = h/0.5m

h = 0.5 X tan80 = 0.5 X 0.1405m = 7cm Ans.

Let the radius of the sun be l (m)

l/0.5 = 0.7 X 109/1.5 X 1011 =tan0

l = 0.5 X 0.7 X 109/1.5 X 1011 = 0.233X10-2m

=0.23cm

Therefore, the diameter of the image = 0.46cm

The combination of the above WAEC Physics questions 2022 and the WAEC Physics answers 2021 samples for essay, theory, and OBJ (objectives) above, will surely help candidates a lot.

1. Imo Akpan Bassey