Bu'aan kutaa 12ffaa ba'eera; bu'aa kee eessatti akka ilaaltu

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Qormaata galuumsa kutaa 12ffaa Fiiziksii, bara 2016 A.L.I (2024), marsaa 1

Gaaffilee dhugaa qormaata galuumsa yunivarsiitii kutaa 12 kan Fiiziksii, akkuma barattoonni bara 2016 A.L.I itti fudhatanitti. Tokkoon tokkoon gaaffii deebii sirrii fi ibsa qaba. Qormaanni bara 2016 A.L.I marsaa tokkoo ol kennamee ture. Fuulli kun marsaa 1 qaba.

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  • 2016 A.L.I (2024), marsaa 1

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  • Gaaffilee 46 deebii waliin

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Gaaffilee qormaata kanaa yaalaa

Deebii banuun dura tokkoon tokkoon gaaffii ofii keessaniin deebisaa. Ibsi gara kutaa kitaaba barnootaa sirriitti waan qajeelchuuf, yeroo gaaffii dogoggortan fuula kam irra deebi'uu akka qabdan ni beektu.

Gaaffii 1

In the following choices, given that the symbols N, m, J, kg, stand for Newton, meter, Joule, and kilogram, respectively, then which one is the correct SI unit of torque?

  1. A.N
  2. B.kg m²
  3. C.N m = J
  4. D.N m ≠ J
Deebii fi ibsa ilaalaa

Deebii: D N m ≠ J

Maaliif

Although torque has the same physical dimensions as work/energy (Newton-meter), by convention, the Joule (J) is reserved strictly for energy and work to avoid confusion, so for torque, N m≠J\text{N m} \neq \text{J}.

Gaaffii 2

Which one of the following waves is an example of longitudinal waves in material medium?

  1. A.Water wave at depth
  2. B.P-waves in earthquake
  3. C.Wave in a string
  4. D.S-waves in earthquake
Deebii fi ibsa ilaalaa

Deebii: B P-waves in earthquake

Maaliif

Primary waves (P-waves) in an earthquake are longitudinal compressional waves that travel through the Earth's interior, unlike S-waves and waves on a string which are transverse.

Gaaffii 4

Which one of the following statements is correct about the difference between orbital and escape velocities of a satellite orbiting the Earth?

  1. A.Orbital velocity depends on the radius of the Earth, whereas scape velocity depends on the radius of the satellite's orbit.
  2. B.Scape velocity depends on the radius of the Earth, whereas orbital velocity depends on the radius of the satellite's orbit.
  3. C.Orbital velocity is inversely proportional to the radius of the Earth, whereas scape velocity is directly proportional to the radius of the Earth.
  4. D.Orbital velocity depends on the mass of the earth, whereas scape velocity depends on the mass of the satellite.
Deebii fi ibsa ilaalaa

Deebii: B Scape velocity depends on the radius of the Earth, whereas orbital velocity depends on the radius of the satellite's orbit.

Maaliif

The escape velocity from the surface of the Earth depends on the radius of the Earth (vesc=2GME/REv_{\text{esc}} = \sqrt{2GM_{\text{E}}/R_{\text{E}}}), whereas the orbital velocity of a satellite depends on the radius of its orbit (vorb=GME/rv_{\text{orb}} = \sqrt{GM_{\text{E}}/r}).

Gaaffii 5

Which one of the following statements is correct about actions of A.C. and D.C. generators?

  1. A.The voltage output of D.C. generators varies periodically whereas the voltage output of A.C generator is constant.
  2. B.The current outputs of both generator A.C. and D.C. generator have constant values.
  3. C.The voltage induced by A.C. generator reverses its direction periodically whereas by the D.C. generators has a constant value.
  4. D.The current outputs of both A.C. and D.C. generators reverse their directions periodically.
Deebii fi ibsa ilaalaa

Deebii: C The voltage induced by A.C. generator reverses its direction periodically whereas by the D.C. generators has a constant value.

Maaliif

An AC generator produces an alternating voltage that periodically reverses its direction, whereas a DC generator uses a commutator to ensure the output voltage maintains a constant direction (polarity).

Gaaffii 6

An electric motor exerts a constant 10 N⋅m torque on a grindstone, which has a moment of inertia of 5.0 kg⋅m 2 about its axis. The system starts from rest and turns. What is the work done by the motor in 4.0 s?

  1. A.160 J
  2. B.40 J
  3. C.2 J
  4. D.320 J
Deebii fi ibsa ilaalaa

Deebii: A 160 J

Maaliif

Using Newton's second law for rotation, the angular acceleration is α=τ/I=10/5=2 rad/s2\alpha = \tau/I = 10/5 = 2\text{ rad/s}^2. The angular displacement is θ=12αt2=12(2)(4.0)2=16 rad\theta = \frac{1}{2}\alpha t^2 = \frac{1}{2}(2)(4.0)^2 = 16\text{ rad}, so the work done is W=τθ=10×16=160 JW = \tau \theta = 10 \times 16 = 160\text{ J}.

Gaaffii 7

Three charges Q 1 = 5 x 10 -10 C, Q 2 = 2 x 10 -10 C and Q 3 = 3 x 10 -10 C, are placed on the x axis at points x = 0, x = 2 cm and x = 4 cm, respectively, as shown in the figure below. What is the magnitude of electrostatic force exerted on Q 2 by the other two charges?

  1. A.3.6 x 10 -6 N
  2. B.9 x 10 -7 N
  3. C.9 N
  4. D.9 x 10 -15 N
Deebii fi ibsa ilaalaa

Deebii: B 9 x 10 -7 N

Maaliif

The electrostatic force on Q2Q_2 due to Q1Q_1 is F12=kQ1Q2/r2=2.25×10−6 NF_{12} = k Q_1 Q_2 / r^2 = 2.25 \times 10^{-6}\text{ N} (to the right), and due to Q3Q_3 is F32=kQ3Q2/r2=1.35×10−6 NF_{32} = k Q_3 Q_2 / r^2 = 1.35 \times 10^{-6}\text{ N} (to the left). The net force is the difference, which is 0.9×10−6 N=9×10−7 N0.9 \times 10^{-6}\text{ N} = 9 \times 10^{-7}\text{ N}.

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Gaaffilee 46 kuusaa kana keessa jiran hunda akka waraqaa qormaataa maxxanfameetti, furtuu deebii ibsa 46 waliin immoo akka faayilii lammaffaatti. Maxxansaa yookiin daataa malee dubbisaa.

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Qormaatilee Fiiziksii biroo bara 2016 A.L.I

2016 A.L.I (2024)2016 A.L.I (2024), TigraayFakkeenyaa, bara 2016 A.L.I

Qormaatilee Fiiziksii kan waggoota biroo

2018 A.L.I (2026)2018 A.L.I (2026), maxxansa 12018 A.L.I (2026), maxxansa 22017 A.L.I (2025)2017 A.L.I (2025), maxxansa 12017 A.L.I (2025), maxxansa 22015 A.L.I (2023)2014 A.L.I (2022)2013 A.L.I (2021)2012 A.L.I (2020)2011 A.L.I (2019)2010 A.L.I (2018)2009 A.L.I (2017)2008 A.L.I (2016)2007 A.L.I (2015)2006 A.L.I (2014)2005 A.L.I (2013)

Qormaatilee kana fakkaatan dabalataa

Qormaatilee Fiiziksii kutaa 12ffaa hundaQormaatilee bara 2016 A.L.I hundaGosa barnootaa fi bara hunda

Qormaata kana taa'uu dura Fiiziksii qayyabadhu

Yaadannoon gabaabaan Fiiziksii kutaa 12 kaardii 28 qaba. Tokkoon tokkoon boqonnaa boqonnaadhaan kitaaba biyyaalessaa irraa qophaa'ee seericha, mallattoowwan isaa maal bakka akka bu'an fi dogoggora qabxii nama dhabsiisu ni ibsa.

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Kunneen gaaffilee dhugaa qormaata galuumsa Fiiziksii bara 2016 A.L.I ti?

Eeyyee. Qormaata galuumsa yunivarsiitii biyyaalessaa kan Fiiziksii barattoonni bara 2016 A.L.I (2024) fudhatan irraa fudhataman. Kuusaan keenya gaaffilee isaa 46 qaba; tokkoon tokkoon isaanii deebii fi ibsa gara kitaaba barnootaatti qajeelchu qabu.

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