Form 4 Physics national exam 2024/2025 with answers
The 2024/2025 Form 4 national exam paper for Form 4 Physics, question by question. Take it timed like the real exam, then see the answer and explanation to every question.
- 59 questions, 100 marks
- 120 minutes
Take this paper
120 minutes, 100 marks. Multiple choice is marked for you; you mark your written answers against the marking points.
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Instructions to candidates
Answer all questions. Read each question carefully before answering. Write your answers on the exam paper. Time: 2 hours.
Choose the best answer for each of the following (40 Marks)
- 11 mark
The branch of physics that deals with motion and force is called :
- A.Optics
- B.Mechanics
- C.Atomic
- D.Electromagnetism
- 21 mark
The magnetic field lines originate from :
- A.East Pole
- B.South Pole
- C.North Pole
- D.West Pole
- 31 mark
In which of the following diagrams show P and Q are series with each other and parallel with R.
- A.(A)
- B.(B)
- C.(C)
- D.(D)
- 41 mark
The period of SHM depends on:
- A.Length of the string
- B.Mass of the spring
- C.Acceleration due to gravity
- D.Mass of vibrating body
- 51 mark
The figure below shows the journey made by a car. At what interval the velocity will be constant
- A.Between O and K
- B.Between L and M
- C.Between K and L
- D.Between O and M
- 61 mark
Which quantity measures the figure below
- A.Pressure
- B.Energy.
- C.Volume
- D.Temperature
- 71 mark
The device used for measuring potential difference (Voltage) is known as :
- A.Ammeter
- B.Voltmeter
- C.Ohmmeter
- D.Galvanometer
- 81 mark
According to wave properties which property shows the figure below
- A.Reflection
- B.Refraction
- C.Diffraction
- D.Rectilinear Propagation
- 91 mark
Two teams from Somali public schools are playing a tug war. Find their resultant force by using in the figure below. (The figure shows 300 N to the left and 300 N to the right.)
- A.600N
- B.300N
- C.0N
- D.0.5 N
- 101 mark
which method of heat transfer occurs in vacuum:
- A.conduction
- B.conduction
- C.radiation
- D.induction
- 111 mark
In the early morning the sun can cause the buildings to form a shadow. This shadow appears
- A.Long
- B.fat
- C.thin
- D.short
- 121 mark
In the figure shows pendulums with different strings, each pendulum is pulled to the sides and are released. Which of the of the pendulums oscillates with the lowest frequency?
- A.String A
- B.string B
- C.string C
- D.string D
- 131 mark
The third law of Newton is also known as:
- A.The law of inertia
- B.law of acceleration
- C.The law of action and reaction
- D.The law of weight
- 141 mark
The figure below shows one of the following motion
- A.Linear Motion
- B.Projectile Motion
- C.Circular Motion
- D.Oscillatory Motion
- 151 mark
The Quantity of heat energy is given by :
- A.Q = mcΔt
- B.Q = mcΔt
- C.Q = mcΔt
- D.Q = mcΔt
- 161 mark
In the diaagram belaw the amplitude the wave in centimeters is equivalent to
- A.1cm
- B.2cm
- C.3cm
- D.4cm
- 171 mark
Which of the following materials allows light to pass through it ?
- A.Copper
- B.wood
- C.glass
- D.rubber
- 181 mark
The frequency of simple harmonic motion is given by:
- A.f = (1/2π) sqrt(k/m)
- B.f = (1/2π) sqrt(m/k)
- C.f = 2π sqrt(k/m)
- D.f = 2π sqrt(m/k)
- 191 mark
In the following shapes represents same brick place in different ways which case has its least pressure:
- A.a
- B.B
- C.c
- D.The three shapes have same pressure
- 201 mark
The characteristics of sound which helps us to distinguish between a woman's voice and man's, even voice without seeing them is :
- A.Intensity
- B.Loudness
- C.Quality
- D.Pitch
- 211 mark
A microphone of a mosque is set up to record and display a sound of pray(Salat) made by loudspeaker. Which one of the following sound is louder?
- A.a
- B.b
- C.c
- D.d
- 221 mark
The angle between two plane mirrors is 60°. if an object is placed between them, the number of images formed will be
- A.6 images
- B.5 images
- C.4 images
- D.3 images
- 231 mark
The image formed by a plane mirror is
- A.real and erect
- B.virtual and inverted
- C.virtual and erect
- D.real and magnified
- 241 mark
A battery of 220V is connected to a lamp as shown in the figure. The current passed through it is (the lamp has a resistance of 0.8 Ω)
- A.220V
- B.176V
- C.275A
- D.220.8V
- 251 mark
The principle of formation of image in lenses is :
- A.Reflection of light
- B.Refraction of light
- C.Dispersion of light
- D.Scattering of light
- 261 mark
If you stand in front of a special mirror and you see that the image of your head is bigger than Normal, the middle part of your body is same size and your legs is smaller than normal. The special mirror is made up of three types of mirror in the following order from top Downward:
- A.Plane Concave Convex
- B.Concave Plane Convex
- C.convex Plane Concave
- D.Plane Convex Concave
- 271 mark
A coal appears dark when viewed with white light because it _____ All light falling on it.
- A.Reflect
- B.Disperse
- C.Refract
- D.Absorb
- 281 mark
The stars appears to twinkle due to:
- A.refraction
- B.diffraction
- C.interference
- D.reflection
- 291 mark
The seven colors obtained in the screen when white light passes through a prism is known as.
- A.Scattering
- B.Refraction
- C.Spectrum
- D.Dispersion
- 301 mark
Calculate the equivalent capacitors as shown in the figure below (C1 = 4 μF and C2 = 6 μF)
- A.3.4μF
- B.2.4μF
- C.4.4μF
- D.5.4μF
- 311 mark
In real life the faraday's law can be applied in many devices which of the following is an application of it.
- A.Electric bulb
- B.Watches
- C.televisions
- D.tape player
- 321 mark
The maximum voltage circuit is 60V. using θ = 30° its instantaneous voltage will be
- A.40V
- B.50V
- C.30V
- D.60V
- 331 mark
The basic elements in DC is resistor while in AC the three basic elements are:
- A.Resistor, Inductor and Capacitor(RLC)
- B.Voltage, Diode and Capacitor(VDC)
- C.Transistor, Diode and Resistor (TDR)
- D.Diode, Inductor and Resistors (DLR)
- 341 mark
The below figure represents :
- A.and gate
- B.or gate
- C.not gate
- D.Nor gate
- 351 mark
The two most frequently used materials for electronics are
- A.Carbon and Selenium
- B.Selenium and Glass
- C.Germanium and Silicon
- D.Gallium and Arsenic
- 361 mark
Which of the following electromagnetic spectrum is particularly more hazardous
- A.γ-ray
- B.Infrared
- C.X-ray
- D.Ultraviolet
- 371 mark
The different elements having same mass number but different atomic number are called :
- A.isobars
- B.isotones
- C.isotopes
- D.isomers
- 381 mark
222/86 Rn → 218/84 Po + 4/2 He + Energy. This equation represents a radioactive emission of.
- A.Alpha (α) - Particle
- B.Beta (β) - Particle
- C.gamma (γ) - Particle
- D.Theta (θ) - particle
- 391 mark
Which type of radiation is stopped by a sheet paper ?
- A.Bata particle
- B.alpha particle
- C.gamma ray
- D.x-ray
- 401 mark
For every one degree Celsius rise in temperature the speed of sound in air is increased by
- A.0.4 m/s
- B.0.2 m/s
- C.0.6 m/s
- D.0.1 m/s
Part Two: Direct Questions [28 marks]
- B1a4 marks
a) What is a magnet ?
- B1b4 marks
a) What are the poles of magnet ?
- B24 marks
Complete the table below with the names of the type of current which generated the specific wave front: 1) a graph of current I against time t that is a straight horizontal line; 2) a graph of current I against time t that is a sine wave.
- B34 marks
Distinguish between transparent and translucent materials
- B44 marks
List the five common properties of wave
- B54 marks
Compare with examples luminous and non-luminous bodies
- B64 marks
Give reason why the red light is used as a universal danger signal ?
- B7a2 marks
An 18-years old students is not able to see clearly the questions written on the blackboard placed at a distance of 2m from him. a) Name the defect of vision suffering from him
- B7b2 marks
An 18-years old students is not able to see clearly the questions written on the blackboard placed at a distance of 2m from him. b) Name the type of lens used to correct his defect.
Part Three: solve each of the following [32 marks]
- C84 marks
The yacht shown in figure 1 has amass of 6200kg. Calculate its weight in air. Take Acceleration due to gravity g = 10 m/s^2 ?
- C94 marks
The minute arm of the clock rotates in one complete revolution (2π) in 60 seconds. Calculate the angular frequency of the arm.
- C104 marks
Find the intensity level for a sound wave of intensity of 4 × 10^-6 W/m^2
- C114 marks
The primary current in a transformer is 20 A if the primary coil has 200 turns and secondary coil has 600 turns as shown in the figure below. What current follow in the secondary coil
- C12a2 marks
An electron is accelerated by a potential difference of 2000 V if the electron charge is 1.6 × 10^-19 C what is the electron energy in a) Joule(J)
- C12b2 marks
An electron is accelerated by a potential difference of 2000 V if the electron charge is 1.6 × 10^-19 C what is the electron energy in b) Electron volt(e.V)
- C134 marks
Calculate the equivalent resistance as shown below (2 Ω, 6 Ω and 12 Ω connected in parallel).
- C144 marks
A student having s a myopic eye uses a concave lens of focal length 15cm. what is the power of the lens?
- C15a2 marks
A 20 cm straight wire moves at a constant speed of 5 m/s perpendicular to a magnetic field of strength 0.004 T. a) How much induced electromotive force is generated in the wire?
- C15b2 marks
A 20 cm straight wire moves at a constant speed of 5 m/s perpendicular to a magnetic field of strength 0.004 T. b) If the wire has a resistance of 0.25 Ω what is the magnitude of the current passing through it?
Paper set by the Federal Ministry of Education, Culture and Higher Education (MoECHE), Somalia. Shared free of charge to help students prepare. The answers and explanations are written by Sheerxirfad teachers.
