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Form 4 Physics imtixaanka qaranka 2024/2025 iyo jawaabihiisa

Imtixaanka qaranka Fasalka 4aad ee 2024/2025 ee Form 4 Physics, su'aal su'aal. Ku gal adigoo waqti leh sida imtixaanka dhabta ah, kadibna arag jawaabta iyo sharaxa su'aal kasta.

59 su'aalood, 100 dhibcood
120 daqiiqo

Gal imtixaankan

120 daqiiqo, 100 dhibcood. Su'aalaha doorashada waa laguu saxayaa; jawaabaha qoraalka adiga ayaa ku saxaya qodobada sixitaanka.

Akoon bilaash ah ayaa loo baahan yahay si aad u bilowdo, si jawaabahaaga iyo natiijooyinkaaga loo kaydiyo.

Tilmaamaha ardayga

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)

1
The branch of physics that deals with motion and force is called :
- A.Optics
- B.Mechanics
- C.Atomic
- D.Electromagnetism
1 dhibcood
2
The magnetic field lines originate from :
- A.East Pole
- B.South Pole
- C.North Pole
- D.West Pole
1 dhibcood
3
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)
1 dhibcood
4
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
1 dhibcood
5
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
1 dhibcood
6
Which quantity measures the figure below
- A.Pressure
- B.Energy.
- C.Volume
- D.Temperature
1 dhibcood
7
The device used for measuring potential difference (Voltage) is known as :
- A.Ammeter
- B.Voltmeter
- C.Ohmmeter
- D.Galvanometer
1 dhibcood
8
According to wave properties which property shows the figure below
- A.Reflection
- B.Refraction
- C.Diffraction
- D.Rectilinear Propagation
1 dhibcood
9
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
1 dhibcood
10
which method of heat transfer occurs in vacuum:
- A.conduction
- B.conduction
- C.radiation
- D.induction
1 dhibcood
11
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
1 dhibcood
12
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
1 dhibcood
13
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
1 dhibcood
14
The figure below shows one of the following motion
- A.Linear Motion
- B.Projectile Motion
- C.Circular Motion
- D.Oscillatory Motion
1 dhibcood
15
The Quantity of heat energy is given by :
- A.Q = mcΔt
- B.Q = mcΔt
- C.Q = mcΔt
- D.Q = mcΔt
1 dhibcood
16
In the diaagram belaw the amplitude the wave in centimeters is equivalent to
- A.1cm
- B.2cm
- C.3cm
- D.4cm
1 dhibcood
17
Which of the following materials allows light to pass through it ?
- A.Copper
- B.wood
- C.glass
- D.rubber
1 dhibcood
18
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)
1 dhibcood
19
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
1 dhibcood
20
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
1 dhibcood
21
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
1 dhibcood
22
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
1 dhibcood
23
The image formed by a plane mirror is
- A.real and erect
- B.virtual and inverted
- C.virtual and erect
- D.real and magnified
1 dhibcood
24
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
1 dhibcood
25
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
1 dhibcood
26
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
1 dhibcood
27
A coal appears dark when viewed with white light because it _____ All light falling on it.
- A.Reflect
- B.Disperse
- C.Refract
- D.Absorb
1 dhibcood
28
The stars appears to twinkle due to:
- A.refraction
- B.diffraction
- C.interference
- D.reflection
1 dhibcood
29
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
1 dhibcood
30
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
1 dhibcood
31
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
1 dhibcood
32
The maximum voltage circuit is 60V. using θ = 30° its instantaneous voltage will be
- A.40V
- B.50V
- C.30V
- D.60V
1 dhibcood
33
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)
1 dhibcood
34
The below figure represents :
- A.and gate
- B.or gate
- C.not gate
- D.Nor gate
1 dhibcood
35
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
1 dhibcood
36
Which of the following electromagnetic spectrum is particularly more hazardous
- A.γ-ray
- B.Infrared
- C.X-ray
- D.Ultraviolet
1 dhibcood
37
The different elements having same mass number but different atomic number are called :
- A.isobars
- B.isotones
- C.isotopes
- D.isomers
1 dhibcood
38
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
1 dhibcood
39
Which type of radiation is stopped by a sheet paper ?
- A.Bata particle
- B.alpha particle
- C.gamma ray
- D.x-ray
1 dhibcood
40
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
1 dhibcood

Part Two: Direct Questions [28 marks]

B1a
a) What is a magnet ?
4 dhibcood
B1b
a) What are the poles of magnet ?
4 dhibcood
B2
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.
4 dhibcood
B3
Distinguish between transparent and translucent materials
4 dhibcood
B4
List the five common properties of wave
4 dhibcood
B5
Compare with examples luminous and non-luminous bodies
4 dhibcood
B6
Give reason why the red light is used as a universal danger signal ?
4 dhibcood
B7a
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
2 dhibcood
B7b
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.
2 dhibcood

Part Three: solve each of the following [32 marks]

C8
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 ?
4 dhibcood
C9
The minute arm of the clock rotates in one complete revolution (2π) in 60 seconds. Calculate the angular frequency of the arm.
4 dhibcood
C10
Find the intensity level for a sound wave of intensity of 4 × 10^-6 W/m^2
4 dhibcood
C11
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
4 dhibcood
C12a
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)
2 dhibcood
C12b
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)
2 dhibcood
C13
Calculate the equivalent resistance as shown below (2 Ω, 6 Ω and 12 Ω connected in parallel).
4 dhibcood
C14
A student having s a myopic eye uses a concave lens of focal length 15cm. what is the power of the lens?
4 dhibcood
C15a
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?
2 dhibcood
C15b
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?
2 dhibcood

Imtixaanka waxaa diyaarisay Federal Ministry of Education, Culture and Higher Education (MoECHE), Somalia. Waxaa lagu wadaagay bilaash si ardaydu ugu diyaargaroobaan. Jawaabaha iyo sharaxyada waxaa qoray macallimiinta Sheerxirfad.

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