# Complete WAEC Physics Questions and Answers 2023/2024: Theory and Objectives

WAEC GCE Physics Questions and Answers: Complete WAEC GCE Physics 2023 questions and answers. Welcome to the WAEC Physics questions and answers page for 2023/2024.

WAEC GCE Physics Objective And Theory Answers, WAEC Physics Essay 2023, WAEC GCE 2022 Physics, and the tips you need to pass your WAEC GCE Physics exam with ease are all available.

## WAEC GCE Physics Objectives And Theory Answers 2023

(If you see any options here, choose it from your objectives)

### WAEC Physics Questions and Answers:

1. Gravitational force
2. Kinetic or potential
3. Violet
4. Tesla
5. Electric motor
6. Loudness
7. Electric field
8. Constriction
10. Good absorbers of radiant heat are good emitters
11. Decrease
12. Sound wave
13.

### WAEC Physics Questions and Answers

14. I and IV only
15. Diaphragm
16. Multiplier is high resistance change it to voltmeter
17. P is at the level with Q
18. 34.0⁰C
19. 0.02secs
20. 2.7×10kg/m³
21. Centripetal force applied in the wheel rotates it
22. Mg(sθ-μcosθ)
23. 0.60Ω^-¹m^-¹
24. 800N
25. Both earth and Moon travel around the sun
26. 0.04secs
27. 0.25×10³
28. 2uf
29. Experience electrostatic force of repulsion
30. 6m/s²
31. 0.67
32. Axe
33. Mass of the conductor
34. 20ms^-¹
35. Charge ionizes the surrounding air
36. East-west
37. 5.8 A
38. 25.1m
39. 20N
40. 40g
41. Critical angle
42. Momentum
43. fixed mass of gas
44. K
45. Jumps to a higher permissible energy level
46. Mass of the liquid
47. Spring balance
48. Argon
49. Images are formed behind the mirror always
50. Charles coloumb

## WAEC GCE Physics Theory Answers for Today

No (1)

(i) They are used to determine the unit of a given physical quantity in a given unit system.

(ii) They are used to calculate the dimensions of physical constants or coefficients.

(iii) They are used to convert physical quantities from one unit system to another.

No (2a)

Time of flight (T) is the amount of time it takes for a projectile to return to the same level from which it was launched.

T= 2usin θ / g

Maximum height (H) is the highest/greatest vertical distance attained as measured from the horizontal projectile plane.

H = U²sin²θ / 2g

(2c)

Range (R) is defined as the horizontal distance between the point of projection and the point at which the projectile re-enters the projection plane.

R= U²sin2θ / g

No (7a)

Magnetic materials are materials that are studied and used primarily for their magnetic properties. A material’s magnetic response is largely determined by the magnetic dipole moment associated with its electrons’ intrinsic angular momentum, or spin.

(5a)

The forbidden gap is a group of energy levels that electrons cannot occupy; these energies are located between the conduction and valence bands.

(5b)

(i) negative-charged free electrons
(ii) holes with a positive charges

(7b)

(i) by raising the temperature above the Curie point

(ii) by using a strong magnetic field

### WAEC Physics Questions and Answers

PART II

No (9ai)

Heat is defined as the transfer of thermal energy between molecules within a system and is measured in Joules. Heat is a measure of how energy moves or flows.… Temperature describes the average kinetic energy of molecules within a material or system and is measured in degrees Celsius (°C), Kelvin (K), Fahrenheit (°F), or Rankine (R).

(9aii)

At normal atmospheric pressure, the lower fixed point, or ice point, is the temperature of pure melting ice. The upper fixed point, on the other hand, is the temperature of pure boiling water at normal atmospheric pressure.

(9c)

Linear expansivity is defined as the fractional increase in length of a solid specimen per unit increase in temperature. If a specimen’s length increases from l1 to l2 as its temperature rises °, the expansivity () is given by l2 = l1(1 + ).*PHYSICS*

### WAEC Physics Questions and Answers

(10bi)

According to the superposition principle, when two or more waves intersect at a point, the displacement at that point equals the sum of the displacements of the individual waves. Individual wave displacements can be both positive and negative. If the displacements are vectors, the sum is computed through vector addition.

(10c)

The wavelength affects refraction. Because blue light has a shorter wavelength moving from air to glass than red light, it refracts more than red light.

(11ai)

Reactance is the resistance of a circuit element to current flow caused by its inductance or capacitance.

(11aii)

Impedance is a measure of the resistance to the flow of alternating current through a circuit.

### WAEC Physics Questions and Answers…. cont’d

No. 11

(8ai) Work is said to be done when a force moves a body a certain distance in the direction of the force and the product of the force and the distance moved is equal to the force and the distance moved.

(8aii)
Work done = force multiplied by distance i.e. W = Force * distance
W= F*S
But, F = m(v/t) and S = 1/2vt
Work done = m(v/t) * 1/2vt
= 1/2mv²
Ek = 1/2mv²
i.e. work done = change in kinetic energy of the body

(8bi) Kinetic friction is the force that must be overcome in order for one body to move at a constant/uniform speed over another.

##### (8bii)

(i)The nature of the surfaces in contact

(ii)Depends on the normal force pressing the surfaces together.

(8ci)

Tc – umg = ma
Tc – (0.3 * 3* 10)= 3*2
Tc – 9 = 6
Tc = 9+6 = 15N

(8cii)

TB – 2umg = ma
TB – 2(9)= 3*2
TB = 6+18
TB = 24N

##### (8ciii)

TA – 3umg = ma
TA – 3(9) = 3*2
TA – 27 = 6
TA = 6+27
TA = 33N

Note: The questions below are not exactly 2023 WAEC GCE Physics questions and answers but likely WAEC Physics repeated questions and answers.
These are practice questions. On the day of the WAEC GCE Physics examinationthe 2021 WAEC GCE Physics expo will be posted on this page.
1. Which electrical device is represented in the diagram above?

(a) a.c. generator

(b) d.c motor

(c) d.c generator

(d) a.c. motor

2. A simple barometer is built with a liquid Q1 with a density of 16.2g/cm3. Determine the shortest length of tube required to measure 1.5 atmospheres of pressure. (Mercury density = 13.6g/cm3, 1 atmosphere = 76.0cm mercury)

(a) 1358 mm

(b) 760 mm

(c) 957 mm

(d) 638 mm

### WAEC Physics Questions and Answers:

3. As shown in the diagram above, a bar AB is balanced horizontally on two knife edges. Calculate the weight of the bar.

(a) 10.0 N

(b) 20.0 N

(c) 40.0 N

(d) 50.0 N

4. To obtain a virtual, erect, and magnified image from a thin converging lens, an object must be placed……….

(a) Between the focus and the lens

(b) at the focus

(c) between the focus and twice the focal length

(d) beyond twice the focal length

5. The diagram above describes a transverse traveling wave. Which two points are 180o out of phase?

(a) A and E

(b) B and D

(c) C and F

(d) D and H

6. two objects P and Q, with masses of 100 kg and 20 kg, are 1.2 m apart on a horizontal surface. Determine the net gravitational force on Q. G = 6.67 x 10-1 Nm2kg-2

(a) 1.11 x 10-7 N towards P

(b) 1.11 x 10-7 N towards Q

(c) 9.26 x 10-8 N towards P

(d) 9.26 x 10-8 N towards Q

7. A transformer’s primary has 100 turns and its secondary has 200 turns. Determine the voltage at the secondary if the voltage at the primary is 100 V.

(a) 50 V

(b) 100 V

(c) 200 V

(d) 400 V

8. In the diagram shown above, a block of mass M is at rest on a plane inclined at an angle θ to the horizontal. As θ increases, the velocity ratio of the plane………

(a) Increases

(b) decreases

(c) remain the same

(d) decreases and later increases

9. When the speed of a car is halved, its kinetic energy is……….

(a) Doubled

(b) quartered

(c) halved

10. A 400cm wire is stretched between two fixed points. It has a fundamental frequency of 150 Hz when plucked. Determine the speed of the generated wave.

(a) 250 ms-1

(b) 625 ms-1

(c) 1200 ms-1

(d) 1500 ms-1

11. The above diagram depicts a waveform. Determine the number of wavelengths contained within it.

(a) 4

(b) 3½

(c) 2½

(d) 2

12. A resistor with a fixed resistance value is referred to as a……..

(a) Restance box

(b) standard resistor

(c) shunt

(d) multiplier

13. Which of the following is not an advantage of an alkaline accumulator?

(a) The electrolyte does not need attention

(b) it can be recharged

(c) it has low internal resistance

(d) it has a much longer life than lead-acid accumulator

14. The diagrams above show the wire connections to a three-pin plug. The wires P, Q, and R are labeled as follows:

(a) Live, neutral and earth

(b) neutral, earth and live

(c) earth, live and neutral

(d) earth, neutral and live

15. Which of the following parallel plate capacitor statements is/are correct? I. The capacitor’s capacitance is inversely proportional to the distance between the plates. II. Capacitors have the ability to filter a, c, signals from d, c, and III. Capacitors can store charges.

(a) I only

(b) I and II only

(c) II and III only

(d) I, II, and III

16. A circuit contains three ammeters A1, A2, and A3, with A2 and A3 readings shown in the diagram. Determine the value of A1.

(a) 2 A

(b) 3 A

(c) 5 A

(d) 8 A

17. Which of the following statements regarding magnetic lines of force is false? They

(a) Pass through even non-magnetic materials

(b) run from the north pole to be shorted

(c) are in a state of tension and tend to be shored

(d) intersect one another.

18. In which of the following activities is an induction coil not useful?

(a) Investigation of high voltages

(b) Study of electric discharge

(c) Operation of X-ray tubes

(d) A.C. power transmission

19. In an R-L-C series circuit, R = 10Ω, X = 4Ω, and XL = 9Ω. The circuit’s impedance is

(a) 4.1Ω

(b) 5.0Ω

(c) 10.8Ω

(d) 11.2Ω

20. A student investigates the magnetic field around a bar magnet with two compass needles. Which of the following diagrams depicts the needles’ correct direction?

21. Which of the following particles may be emitted during a natural radioactive process?

(a) α=particles and β-particles

(b)α-particles and X-rays

(c) β-particles and X-rays

(d) λ-rays and X-rays

Complete WAEC Physics Questions and Answers:

22. In which of the following situations is the photoelectric effect used? I. Automatic devices for turning on lights at dusk II. Automatic doors in department stores III. Automatic devices for turning on air conditioners IV. Automatic voltage stabilization

(a) I, II and IV only

(b) I, III and IV only

(c) III and IV only

(d) I and II only

### See:WAEC GCE Chemistry 2023/2024 Questions and Answers (Essay and Objectives)

23. Which of the following radiations has the longest wavelength?

(a) Gamma ray

(c) Infrared ray

(d) X-ray

24. In which of the following fields are radioisotopes not used?

(a) Medicine

(b) Oil industry

(c) Agriculture

(d) Weather forecast

25. A nuclide is represented by 7032B. Determine its neutron-proton ratio

(a) 0.5

(b) 0.8

(c) 1.2

(d) 1.5