This is the continuation of waec physics questions and answers, you can see the previous physics waec questions here Waec Physics Questions and Answers, well this set of questions was sent to our inbox and we are saying a big thanks! We are expecting to get waec Physics objectives Answers soon. So far you can study this physics questions and be super ready for the exams.
Waec physics expo questions.
You are to choose 5 out of the first 10 questions.
Question 1. A fruit from a tree of mass 2kg is 5m above the ground. Calculate the Potential Energy of the fruit if it has fallen 3m from the tree.
¤¤Question 2. An object of mass 50kg is placed on an inclined plane at 30 degrees to the horizontal. The height of the inclined plane is 250cm and its length is 500cm. What work is done in moving the object down the plane?(Take g=10m/s).
¤¤Question 3. Draw a labelled diagram of a vacuum flask. Explain how its construction minimizes heat with the surrounding.
¤¤Question 4. The length of a side of a metallic cube at 20 degrees centigrade is 5cm.Given that the linear expansivity of the metal is 4×10^-5, find the volume of the cube at 120 degrees centigrade
¤¤Question 4b. Define the term “cubic expansivity”
¤¤Question 5a. What is meant by a dielectric substance?
¤5b. List the factors which determine the capacitance of a parallel plate capacitor and state the effect each of them has on capacitance?
¤¤Question 6a. Distinguish between stress andstrain as used in elasticity
¤6b. When a force of 40N is applied to the free end of an elastic cord, an extension of 5cm is produced in the cord. Calculate the work done on the cord.
¤¤Question 7. A stone is projected horizontally from the top of a tower with a speed of 5m/s. It lands on the ground level at a horizontal distance of 20m from the foot of the tower. Freebrowsinglink.com
Calculate the height of the tower(g=10m/s)
¤¤Question 8a. Explain cations
8b. Draw and label an electrolysiscell
¤¤Question 9. A capacitor of capacitance 25 micro-farad is connected to an a.c power source of 200Hz. Calculate the reactance of the capacitor.
¤¤Question 10. A half-life of a radioactive source is 1 minute. If the ratemeter connected to the source registers 200micro-ampere at a given time, what would be its reading after 3 minutes?
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