WAEC Physics 3 Practical (Alternative B) Questions and Answers 2023: (Specimens + Apparatus)

The West African Examination Council (WAEC) is responsible for conducting the Waec Physics 3 Practical (Alternative B) examination every year. In this comprehensive guide, we will be discussing the Waec Physics 3 Practical (Alternative B) Questions and Answers for 2023. This article aims to provide candidates with relevant information, tips, and sample questions to help them prepare for the upcoming examination. By using this guide, candidates can gain a better understanding of the Waec Physics 3 Practical (Alternative B) examination format, as well as the essential concepts and skills required to excel in the test.

Overview of Waec Physics 3 Practical (Alternative B) Examination

The Waec Physics 3 Practical (Alternative B) examination is designed to assess candidates’ understanding of physics concepts and their ability to perform experiments and analyze data. The examination typically consists of three main sections: Mechanics, Waves, and Electricity. Each section comprises several questions that require candidates to perform practical tasks and calculations, as well as answer theoretical questions related to the experiments.

Mechanics

In the Mechanics section, candidates will be required to perform experiments and calculations related to topics such as:

• Equilibrium and moments
• Center of gravity
• Forces and motion
• Work, energy, and power

Waves

The Waves section focuses on the following topics:

• Reflection and refraction of light
• Diffraction and interference of waves
• Sound and ultrasound
• Wave properties and characteristics

Electricity

In the Electricity section, candidates will be required to perform experiments and calculations related to topics such as:

• Ohm’s law and resistivity
• Kirchhoff’s laws and electrical circuits
• Electromagnetic induction
• Capacitance and capacitance calculations

Note: These are not guaranteed answers for your WAEC exams. This article aims only to help and guide students achieve success in their studies.

Sample Questions and Answers for Waec Physics 3 Practical (Alternative B) 2023

In this section, we will be providing sample questions and answers for the Waec Physics 3 Practical (Alternative B) examination. These sample questions and answers are meant to give candidates an idea of what to expect during the examination and to help them prepare accordingly.

Mechanics Sample Question

Question:

You are provided with a uniform meter rule, a knife edge, various masses, and other necessary apparatus. Perform the following tasks:

1. Suspend the meter rule horizontally on the knife edge. Read and record the point of balance G of the meter rule. Keep the knife edge at this point throughout the experiment.
2. Using the provided thread, suspend the object labeled W at the 15 cm mark of the meter rule.
3. Suspend a mass M = 20 g on the other side of G. Adjust the position of the mass until the meter rule balances horizontally again.
4. Read and record the position Y of the mass M on the meter rule.

Perform the experiment for four other values of M (40g, 60g, 80g, and 100g), keeping W constant at the 15 cm mark and the knife edge at G. Evaluate the inverse of the distance L between the mass and G for each case, and plot a graph of M against the inverse of L.

Sample Answer:

To perform this experiment, follow the steps outlined in the question. After gathering the data, plot the graph of M against the inverse of L. The slope of the graph represents the relationship between the mass and the inverse of the distance L. This relationship can be used to determine the center of gravity of the meter rule and the mass distribution on the meter rule.

Waves Sample Question

Question:

You are provided with a rectangular glass block, a drawing sheet, a drawing board, four optical pins, and other necessary apparatus. Perform the following tasks:

1. Place the rectangular glass block on the drawing sheet and trace its outline.
2. Draw a normal line and an incident ray at an angle of 30° to the normal.
3. Insert two optical pins along the incident ray and two along the emerging ray.
4. Remove the glass block and extend the incident and emerging rays backward until they intersect.

Determine the angle of deviation and the refractive index of the glass block.

Sample Answer:

To perform this experiment, follow the steps outlined in the question. After completing the experiment, measure the angle of deviation using a protractor. The refractive index of the glass block can be calculated using Snell’s law:

n = sin(i) / sin(r)

where n is the refractive index, i is the angle of incidence, and r is the angle of refraction.

Electricity Sample Question

Question:

You are provided with a potentiometer, an ammeter, a standard resistor, cells, and other necessary materials. Connect the circuit as illustrated in the provided diagram and perform the following tasks:

1. Use the jockey to make contact with the wire at a point T such that AT = d = 20 cm.
2. Close the key, take and record the ammeter reading I.
3. Evaluate the inverse of the current, I^-1.

Repeat the procedure for the values of d = 30, 45, 60, 70, and 85 cm. Plot a graph with I^-1 on the vertical axis and d on the horizontal axis.

Sample Answer:

To perform this experiment, follow the steps outlined in the question. After gathering the data, plot the graph of I^-1 against d. The slope and intercept of the graph can be used to determine the relationship between the current and the distance d. This relationship can be used to analyze the behavior of electrical circuits and the characteristics of the components used in the circuit.

Tips for Success in Waec Physics 3 Practical (Alternative B) Examination

Here are some tips to help candidates excel in the Waec Physics 3 Practical (Alternative B) examination:

1. Understand the key concepts and principles in physics, as well as the relevant formulas and equations.
2. Practice performing experiments and calculations using the provided apparatus and materials.
3. Familiarize yourself with the format and structure of the examination by reviewing past questions and answers.
4. Pay close attention to the instructions given in each question and ensure that you follow them accurately.
5. Take necessary precautions during the experiments to obtain accurate results, such as avoiding parallax errors, ensuring suspended masses do not touch the table, and avoiding drafts.
6. Develop good time management skills to ensure that you can complete all the sections of the examination within the allotted time.

By following these tips and preparing adequately for the Waec Physics 3 Practical (Alternative B) examination, candidates can increase their chances of success and achieve high scores in the examination.

Conclusion

The Waec Physics 3 Practical (Alternative B) Questions and Answers 2023 examination is an essential test for candidates pursuing a career in the field of physics or related disciplines. By using this comprehensive guide, candidates can gain a better understanding of the examination format, essential concepts, and skills required to excel in the test. With adequate preparation and practice, candidates can confidently tackle the Waec Physics 3 Practical (Alternative B) examination and achieve outstanding results.