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Form 4 Physics imtixaanka qaranka 2024 iyo jawaabihiisa

Imtixaanka qaranka Fasalka 4aad ee 2024 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.

56 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 in the ANSWER BOOKLET.

PART ONE: CHOOSE THE CORRECT ANSWER [40 MARKS]

1
For Hooke's Law "Force is proportional to [i.e.: F α ........]"
- A.Displacement(x)
- B.velocity(v)
- C.Energy(E)
- D.Power(P)
2 dhibcood
2
Which one of the following frequencies is an infrasonic vibration?
- A.Below 20Hz
- B.20Hz - 20KHz
- C.Above 20KHz
- D.10MHz
2 dhibcood
3
The below four springs are stretched as noted in the diagram which mass oscillates with highest frequency. (Each spring carries a 100 g mass; extensions: A 15 cm, B 20 cm, C 25 cm, D 30 cm.)
- A.Mass A
- B.Mass B
- C.Mass C
- D.Mass D
2 dhibcood
4
An object is placed at the focal length of a concave mirror. If the focal length of the mirror is 15 cm. the distance of the image will be
- A.7.5 cm
- B.15 cm
- C.zero
- D.infinity
2 dhibcood
5
The SI - unit of induced Electromotive force is
- A.T.m^2
- B.Joule
- C.Weber
- D.Volt
2 dhibcood
6
The type of electricity produced by a battery is
- A.AC
- B.DC
- C.Direct Voltage
- D.emf
2 dhibcood
7
When we want to construct electric circuits, we use symbols to represent the elements of the circuit. Which of the following represent the symbol of capacitor? (a: zigzag line; b: two parallel plates; c: coil; d: triangle with a bar, labelled anode and cathode)
- A.a
- B.b
- C.c
- D.d
2 dhibcood
8
A ray of Monochromatic light passing through air, is incident on water. Which one of the following will be the same for reflected and refracted ray?
- A.Speed
- B.wavelength
- C.direction
- D.Frequency
2 dhibcood
9
Which one of the following is NOT correct about the total internal reflection
- A.Brilliant of the Dimond
- B.working of optical fiber
- C.mirage formation
- D.real and apparent depth of pond.
2 dhibcood
10
All the following are properties of Gamma rays EXCEPT
- A.They have high energy among electromagnetic waves
- B.They carry no charge
- C.They are not affected by magnetic and electric fields
- D.They have very high ionization power
2 dhibcood
11
The diagram below represents (parallel incident rays strike a rough surface and are reflected in different directions)
- A.Regular reflection
- B.Irregular reflection
- C.Total internal reflection
- D.diffraction
2 dhibcood
12
Uranium 238/92 U is an isotope which has number of neutrons:
- A.146
- B.92
- C.238
- D.195
2 dhibcood
13
Which of the fallowing materials allow light to pass through them:
- A.Iron
- B.wood
- C.rubber
- D.Glass
2 dhibcood
14
A push or pull is termed as:
- A.Force
- B.acceleration
- C.Speed
- D.velocity
2 dhibcood
15
The degree of hotness or coldness is known as:
- A.Heat
- B.Temperature
- C.Electricity
- D.Density
2 dhibcood
16
The process of changing substances from solid to liquid is
- A.Melting
- B.Freezing
- C.Boiling
- D.Condensation
2 dhibcood
17
The number of waves in the diagram below are:
- A.2
- B.2.5
- C.5
- D.3.5
2 dhibcood
18
The best transmitter medium of sound is
- A.Solid
- B.Liquid
- C.Gas
- D.Plasma
2 dhibcood
19
A convex lens of focal length (f) is in contact with a concave lens of the same focal length. What will be equivalent to the focal length of the combination?
- A.F
- B.2F
- C.zero
- D.infinity
2 dhibcood
20
Which one of the following figures show a uniform motion? (distance-time graphs: a horizontal line; b straight sloping line through the origin; c curve getting steeper; d rise then fall)
- A.a
- B.b
- C.c
- D.d
2 dhibcood

Part Two: Match the Following Questions (10 marks)

M1
Match the following. The process whereby the electrons are emitted from matter Column B: a. Total internal Reflection; b. Photoelectric effect; c. 1.6×10^-19 C; d. Red and Green; e. Weber; f. blue light; g. 20 N; h. Thermometer; i. Dispersion; j. Can see distinct objects.
1 dhibcood
M2
Match the following. Each electron caries a charge of Column B: a. Total internal Reflection; b. Photoelectric effect; c. 1.6×10^-19 C; d. Red and Green; e. Weber; f. blue light; g. 20 N; h. Thermometer; i. Dispersion; j. Can see distinct objects.
1 dhibcood
M3
Match the following. The SI - unit of magnetic flux (Ø) is Column B: a. Total internal Reflection; b. Photoelectric effect; c. 1.6×10^-19 C; d. Red and Green; e. Weber; f. blue light; g. 20 N; h. Thermometer; i. Dispersion; j. Can see distinct objects.
1 dhibcood
M4
Match the following. Yellow color is combination of Column B: a. Total internal Reflection; b. Photoelectric effect; c. 1.6×10^-19 C; d. Red and Green; e. Weber; f. blue light; g. 20 N; h. Thermometer; i. Dispersion; j. Can see distinct objects.
1 dhibcood
M5
Match the following. Red object will appear dark when irradiated to Column B: a. Total internal Reflection; b. Photoelectric effect; c. 1.6×10^-19 C; d. Red and Green; e. Weber; f. blue light; g. 20 N; h. Thermometer; i. Dispersion; j. Can see distinct objects.
1 dhibcood
M6
Match the following. Mirage is a phenomenon formed by Column B: a. Total internal Reflection; b. Photoelectric effect; c. 1.6×10^-19 C; d. Red and Green; e. Weber; f. blue light; g. 20 N; h. Thermometer; i. Dispersion; j. Can see distinct objects.
1 dhibcood
M7
Match the following. An instrument used for measuring temperature is Column B: a. Total internal Reflection; b. Photoelectric effect; c. 1.6×10^-19 C; d. Red and Green; e. Weber; f. blue light; g. 20 N; h. Thermometer; i. Dispersion; j. Can see distinct objects.
1 dhibcood
M8
Match the following. Short - sighted person Column B: a. Total internal Reflection; b. Photoelectric effect; c. 1.6×10^-19 C; d. Red and Green; e. Weber; f. blue light; g. 20 N; h. Thermometer; i. Dispersion; j. Can see distinct objects.
1 dhibcood
M9
Match the following. A fish of mass 2kg has a weight of Column B: a. Total internal Reflection; b. Photoelectric effect; c. 1.6×10^-19 C; d. Red and Green; e. Weber; f. blue light; g. 20 N; h. Thermometer; i. Dispersion; j. Can see distinct objects.
1 dhibcood
M10
Match the following. When white light splits into its component colors Column B: a. Total internal Reflection; b. Photoelectric effect; c. 1.6×10^-19 C; d. Red and Green; e. Weber; f. blue light; g. 20 N; h. Thermometer; i. Dispersion; j. Can see distinct objects.
1 dhibcood

Part three: Direct questions and problems [50 Marks]

S1.1
Section One: Oscillatory Motion. What does the period of simple harmonic motion depend on? [2 marks]
2 dhibcood
S1.2
Section One: Oscillatory Motion. The diagram below shows a pendulum. What is the length of this pendulum if it has a period of 2.5 sec. (use g = 9.8 m/s^2) [3 marks]
3 dhibcood
S2.1
Section Two: Wave Motion. Name the two types of Mechanical wave (1 Mark)
1 dhibcood
S2.2a
Section Two: Wave Motion. The figure below illustrates a transverse wave (displacement against time/s; one period marked from 0 to 4 s). Calculate its period [1 mark]
1 dhibcood
S2.2b
Section Two: Wave Motion. The figure below illustrates a transverse wave (period 4 s from the graph). Find its frequency [2 marks]
2 dhibcood
S2.2c
Section Two: Wave Motion. The figure below illustrates a transverse wave (period 4 s on a time axis). What is the speed of the wave? [2 marks]
2 dhibcood
S3.1
Section Three: Sound waves. Define Echo [1 mark]
1 dhibcood
S3.2
Section Three: Sound waves. An ambulance car moving with a speed of 40 m/s is emitting a sound of frequency 500Hz find the frequency heard by a person standing at the side of the road when the ambulance is moving away from the person (take v = 345 m/s). (5 mark)
5 dhibcood
S4a
Section Four: Reflection of light. The figure below illustrates an object placed between a center (C) and a focal point (F) of a concave Mirror. Complete the characteristic of the image: The position of the image [1 mark]
1 dhibcood
S4b
Section Four: Reflection of light. Object between C and F of a concave mirror. Complete the characteristic of the image: The nature of the image [1 mark]
1 dhibcood
S4c
Section Four: Reflection of light. Object between C and F of a concave mirror. Complete the characteristic of the image: The size of the image [1 mark]
1 dhibcood
S5.1
Section Five: Refraction of light. Find the critical angle of a glass block whose refractive index is 1.5 [2 marks]
2 dhibcood
S5.2a
Section Five: Refraction of light. Two thin lenses of focal lengths +50 cm and -70 cm are placed in Contact with each other calculate: The focal length of the combination [1 mark]
1 dhibcood
S5.2b
Section Five: Refraction of light. Two thin lenses of focal lengths +50 cm and -70 cm are placed in contact (combined focal length 175 cm). The power of the combination [2 marks]
2 dhibcood
S5.2c
Section Five: Refraction of light. Two thin lenses of focal lengths +50 cm and -70 cm are placed in contact. The nature of the combination [1 mark]
1 dhibcood
S6.1
Section Six: Dispersion of light. Why does the sun appear reddish during sunset or sunrise? [3 Marks]
3 dhibcood
S6.2a
Section Six: Dispersion of light. The diagram represents three overlapping circles of additive colors (Red, Blue, Green). What color would region A (red and blue overlap) be?
1 dhibcood
S6.2b
Section Six: Dispersion of light. Three overlapping circles of additive colors (Red, Blue, Green). What color would region B (red and green overlap) be?
1 dhibcood
S6.2c
Section Six: Dispersion of light. Three overlapping circles of additive colors (Red, Blue, Green). What color would region C (blue and green overlap) be?
1 dhibcood
S6.2d
Section Six: Dispersion of light. Three overlapping circles of additive colors (Red, Blue, Green). What color would region D (all three overlap) be?
1 dhibcood
S8a
Section Eight: Alternating Current. A 10 H inductor is connected to a voltage of 220V with frequency 50Hz. Calculate: The reactance of the inductor [3 Marks]
3 dhibcood
S8b
Section Eight: Alternating Current. A 10 H inductor is connected to a voltage of 220V with frequency 50Hz (reactance 3142 Ω). Current in the circuit [2 Marks]
2 dhibcood
S9.1
Section Nine: Electronics. Distinguish between electricity and electronics [2 Marks]
2 dhibcood
S9.2
Section Nine: Electronics. Complete the following table using the logic gate of "AND Gate" [4 Marks]: Inputs A, B: 0 0; 0 1; 1 0; 1 1. Output (A*B) = ?
4 dhibcood
S11.1
Section Eleven: Nuclear Physics. Given that the chlorine isotope 35/17 Cl, find: a) its mass number b) its Neutron number c) its atomic number d) its number of protons [2 marks]
2 dhibcood
S11.2
Section Eleven: Nuclear Physics. A copper coin has a certain mass. Calculate the nuclear energy (in MeV) that is required to separate completely all neutrons from protons. Use the actual mass of 63/29 Cu, given as 62.91367 amu [4 marks]
4 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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