SOLID 2023/2024 WAEC Physics Questions and answers Obj & Theory
WAEC Physics Questions 2023/2024 (Objective & Theory) Check Physics Random continual Questions Here.
Physics, WAEC Physics, Physics WAEC Questions 2021, In this article, I will be showing you past WAEC objective and theory random repeated questions for free. You will also understand how WAEC Physics questions are set and many more examination details. All you need to do is to stay focus and follow this guide
WAEC Physics Questions and answers 2021/2021
The West African Examinations Council (WAEC) is an examination board that conducts the West African Senior School Certificate Examination, for University and Jamb entry examination in West Africa countries. … In a year, over three million candidates registered for the exams coordinated by WAEC.
OBJECTIVES
1. The inner diameter of a test tube can be measured accurately using a
A. micrometer screw guage
B. pair of dividers
C. metre rule
D. pair of vernier calipers
2. Two bodies have masses in the ratio 3:1. They experience forces which impart to them acceleration in the ratio 2:9 respectively. Find the ratio of forces the masses experienced.
A. 1: 4
B. 2: 1
C. 2: 3
D.2:4
3. Particles of mass 10-2kg is fixed to the tip of a fan blade which rotates with angular velocity of 100rad-1. If the radius of the blade is 0.2m, the centripetal force is
A. 2 N
B. 20 N
C. 200 N
D. 400 N
36. 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
37. 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 = ∞
38. 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
39. 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
40. Which combination of the above is true of a body moving with constant speed in a circular track?
A. II and IV
B. I and IV
C. II and III
D. I and III
41. The velocity ratio of a machine is 5 and its efficiency is 75%. What effort would be needed to lift a load of 150N with the machine?
A. 20N
B. 30N
C. 40N
D. 50N
42. At a fixed point below a liquid surface, the pressure downwards is P1 and pressure upwards is P2. It can be deduced that
A. P1 > P2
B. P1 ≥ P2
C. P1 < P2
D. P1 = P2
43. If the force and the velocity on a system are each reduced simultaneously by half, the power of the system is
A. doubled
B. reduced to a quarter
C. reduced by half
D. constant
44. A catault used to hold a stone of mass 500g is extended by 20cm with an applied force F. If the stone leaves with a velocity of 40m/s, the value of F is
A. 4.0 x 102N
B. 2.0 x 103N
C. 4.0 x 103N
D. 4.0 x 104N
45. A stream is flowing at 0.75ms-1 and a boat heading perpendicular for the stream landed at the opposite bank at an angle of 30°. Calculate the velocity of the boat.
A. 1.50ms-1
B. 1.00ms-1
C. 0.86ms-1
D. 0.65ms-1
46. A rope is being used to pull a mass of 10kg vertically upward. Determine the tension in the rope if, starting from rest, the mass acquires a velocity of 4ms-1 in 8s [g = 10ms-2]
A. 5N
B. 50N
C. 95N
D. 105N
47. I. The frictional force is independent of the area of the surfaces in conduct
II. The frictional force depends on the nature of the surfaces in contact
III. The frictional force depends on the speed of sliding
IV. The frictional force is directly proportional to the normal reaction.
48. Which combination of the above is true of sliding friction?
A. I, III and IV
B. I, II and IV
C. I, II and III
D. II, III and IV
49. Total internal reflection occurs when light moves from
A. a dense medium to a less dense medium
B. air to water
C. water to glass
D. a less dense to a dense medium
50. I. Coherence
II. Same frequency
III. Same wavelength
IV. Same Intensity
Which of the conditions above are necessary to produce interference fringes?
A. I and III
B. I, II and IV
C. I, II and III
D. II and III
Physics Theory
1) State the dimensions of the following physical quantities
(a) Acceleration
(b) Pressure
(c) Density
2) A projectile is launched with a velocity of 42ms-1 at an angle of 30o to the horizontal. If the time of flight is 4.2 s, calculate the maximum attainable height. [g = 10 ms-2]
3) Explain why mercury does not wet glass while water does
4) Explain the following terms
(a) Tensile stress;
(b) Young’s modulus
5) An electron of charge 1.60 x 10-19C is accelerated under a potential difference of 1.0 x 105V. Calculate the energy of the electron in joules.
6). Give three observations in support of de Broglie’s assumption that moving particles behave like waves.
7(a)i) Explain relative motion
ii) Two cars moving in opposite directions on the same straight road with velocities 80kmh-1 and 60kmh-1 respectively pass each other at a point. Determine the velocity of the first car relative to the second car.
(b)i) Define force.
ii) Classify the following forces as either contact forces or field forces: push; tension; gravitational force; electrostatic force; reaction and magnetic force.
(c)A body starts from rest and travels in a straight line 2 s with uniform acceleration of 1 ms-2. It then travels at a constant speed for sometime before coming to rest with a uniform retardation of 2 ms-2. The total distance covered by it is 15m.
(i) Draw and label a velocity-time graph for the motion.
(ii) Calculate the:
(α) Velocity attained at the end of 2 s;
(β) Total time taken for the journey
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