የ12ኛ ክፍል ውጤት ወጥቷል፤ ውጤትዎን የሚያዩበት መንገድ

የፈተና ወረቀቶች

የ12ኛ ክፍል ፊዚክስ መግቢያ ፈተና፣ 2012 ዓ.ም. (2020)

ተማሪዎች በ2012 ዓ.ም. የተፈተኑበት የ12ኛ ክፍል የፊዚክስ የዩኒቨርሲቲ መግቢያ ፈተና እውነተኛ ጥያቄዎች። እያንዳንዱ ጥያቄ ትክክለኛ መልስ እና የተብራራ ማብራሪያ አለው።

በነጻ ልምምድ ይጀምሩየጥያቄ ወረቀት

  • የተፈጥሮ ሳይንስ ዘርፍ

    ማን ይፈተናል

  • 2012 ዓ.ም. (2020)

    የፈተና ዓመት

  • 41 ጥያቄዎች ከመልስ ጋር

    በዚህ ስብስብ

ከዚህ ፈተና ጥያቄዎችን ይሞክሩ

መልሱን ከመክፈትዎ በፊት እያንዳንዱን ጥያቄ በራስዎ ይመልሱ። ማብራሪያዎቹ ወደ መማሪያ መጽሐፉ ትክክለኛ ክፍል ይጠቁማሉ፤ ስለዚህ ጥያቄ ሲስቱ የትኛውን ገጽ እንደገና ማንበብ እንዳለብዎት ያውቃሉ።

ጥያቄ 1

Equilibrium is the state of an object when

  1. A.The net force and net torque are both zero.
  2. B.The object has constant angular acceleration.
  3. C.The net forceZ acting on it is constant.
  4. D.The object has constant linear acceleration.
መልሱን እና ማብራሪያውን ይመልከቱ

መልስ፦ A The net force and net torque are both zero.

ለምን

An object is in mechanical equilibrium if and only if both the net external force and the net external torque acting on it are zero, which prevents any linear or angular acceleration.

ጥያቄ 2

The fulcrum of a uniform 20 Kg seesaw that is 4.0 m long is located 2.5 m from one end. A 30Kg child sits on the long end. The weight of a person sitting at the other end in order To balance the seesaw is ________ .

  1. A.433 N
  2. B.567 N
  3. C.750 N
  4. D.850 N
መልሱን እና ማብራሪያውን ይመልከቱ

መልስ፦ B 567 N

ለምን

Taking torque about the fulcrum, the uniform seesaw's center of gravity (at 2.0 m) is 0.5 m from the fulcrum on the long end side. To balance, the torque from the person on the short end (1.5 m from the fulcrum) must equal the sum of torques from the child (at 2.5 m) and the seesaw itself: 1.5Wp=30(10)(2.5)+20(10)(0.5)=850 N⋅m1.5 W_p = 30(10)(2.5) + 20(10)(0.5) = 850\text{ N}\cdot\text{m}, giving Wp≈567 NW_p \approx 567\text{ N}.

ጥያቄ 3

A material rod that is 4.00 m long and 0.5cm20.5\text{cm}^2 in cross-sectional area is found to stretch 0.20cm under a tension of 5000N. The Young's Modulus for this material is _______.

  1. A.2.0×1011 N/m22.0 \times 10^{11}\text{ N/m}^2
  2. B.5.0×108 N/m25.0 \times 10^8\text{ N/m}^2
  3. C.1.0×104 N/m21.0 \times 10^4\text{ N/m}^2
  4. D.1.0×108 N/m21.0 \times 10^8\text{ N/m}^2
መልሱን እና ማብራሪያውን ይመልከቱ

መልስ፦ A 2.0×1011 N/m22.0 \times 10^{11}\text{ N/m}^2

ለምን

Young's Modulus is given by Y=FL0AΔLY = \frac{F L_0}{A \Delta L}. Substituting the values F=5000 NF = 5000\text{ N}, L0=4.0 mL_0 = 4.0\text{ m}, A=0.5×10−4 m2A = 0.5 \times 10^{-4}\text{ m}^2, and ΔL=2.0×10−3 m\Delta L = 2.0 \times 10^{-3}\text{ m} gives Y=2.0×1011 N/m2Y = 2.0 \times 10^{11}\text{ N/m}^2.

ጥያቄ 4

Which one of the following is NOT true about Pascal's principle and its application?

  1. A.In pneumatic application, air is used for pressure transmission instead of liquid.
  2. B.The hydraulic lift is a speed multiplying device in which a large force lifts a light object over a long distance.
  3. C.It has applications in hydraulic brakes for vehicles, where confined oil connects a small piston (brake pedal) to a large piston connected to the brake drums on the wheel of the car.
  4. D.It has applications in hydraulic lift in which a small force is applied to a smaller piston is used to lift heavy object on large.
መልሱን እና ማብራሪያውን ይመልከቱ

መልስ፦ B The hydraulic lift is a speed multiplying device in which a large force lifts a light object over a long distance.

ለምን

A hydraulic lift is a force-multiplying device, not a speed-multiplying device. It allows a smaller input force acting over a larger distance to lift a much heavier load over a shorter distance.

ጥያቄ 5

Which one of the following is NOT correct about factors that affecting the streamlining of objects moving in fluid?

  1. A.The mass of the object
  2. B.Shape and surface area of the object moving in fluid
  3. C.Compressibility of the fluid
  4. D.Density of the fluid
መልሱን እና ማብራሪያውን ይመልከቱ

መልስ፦ A The mass of the object

ለምን

The streamlining of an object depends on the fluid's characteristics (density, viscosity, compressibility) and the object's geometry (shape and surface area), but is independent of the mass of the moving object itself.

ጥያቄ 6

Which of the following is correct?

  1. A.Internal energy of a system is independent of its mass or the number of molecules in the system.
  2. B.Temperature is a measure of the average molecular kinetic energy of a gas.
  3. C.The temperature is a measure of the amount of energy that flows from hot to colder region.
  4. D.Heat is energy that can be transferred from one object to another at equal temperature.
መልሱን እና ማብራሪያውን ይመልከቱ

መልስ፦ B Temperature is a measure of the average molecular kinetic energy of a gas.

ለምን

Temperature is directly proportional to the average translational kinetic energy of the molecules in an ideal gas (KEavg=32kBTKE_{\text{avg}} = \frac{3}{2} k_B T), making Option B the correct statement.

ሙሉውን ፈተና በ PDF ያውርዱ

በዚህ ስብስብ ያሉት 41 ጥያቄዎች ሁሉ እንደ ታትሞ የወጣ ፈተና፣ የመልስ ቁልፉም ከ41 ማብራሪያዎች ጋር እንደ ሁለተኛ ፋይል። ያትሟቸው ወይም ያለ ዳታ ያንብቧቸው።

ነጻ ነው፤ መለያም አይጠይቅም።

የጥያቄ ወረቀትየመልስ ቁልፍ እና ማብራሪያዎች

ሙሉውን ፈተና በሰዓት ተገድበው ይስሩ

ነጻ የ Temari መለያ ሙሉውን የፊዚክስ ፈተና እና የሌሎች ዓመታትንም ሁሉ በሰዓት የተገደቡ የሙከራ ፈተናዎች አድርጎ ከወዲያውኑ ውጤት ጋር ይሰጥዎታል። በማንኛውም ስልክ ላይ፣ ደካማ ግንኙነት ላይም ይሰራል።

በነጻ ልምምድ ይጀምሩ

የሌሎች ዓመታት የፊዚክስ ፈተናዎች

2018 ዓ.ም. (2026)2017 ዓ.ም. (2025)2016 ዓ.ም. (2024)2015 ዓ.ም. (2023)2014 ዓ.ም. (2022)2013 ዓ.ም. (2021)2011 ዓ.ም. (2019)2010 ዓ.ም. (2018)2009 ዓ.ም. (2017)2008 ዓ.ም. (2016)2007 ዓ.ም. (2015)2006 ዓ.ም. (2014)2005 ዓ.ም. (2013)

ይህን ፈተና ከመቀመጥዎ በፊት ፊዚክስ ያጥኑ

የ12ኛ ክፍል ፊዚክስ አጭር ማስታወሻዎች 28 ካርዶች አሏቸው። እያንዳንዱ ከአገር አቀፉ መጽሐፍ ምዕራፍ በምዕራፍ ተዘጋጅቶ ሕጉን፣ ምልክቶቹ ምን እንደሚወክሉና ውጤት የሚያሳጣውን ስህተት ይናገራል።

የፊዚክስ ማስታወሻዎችን ይክፈቱ
እነዚህ እውነተኛዎቹ የ2012 ዓ.ም. የፊዚክስ መግቢያ ፈተና ጥያቄዎች ናቸው?

አዎ። ተማሪዎች በ2012 ዓ.ም. (2020) ከተፈተኑበት ብሔራዊ የዩኒቨርሲቲ መግቢያ የፊዚክስ ፈተና የተወሰዱ ናቸው። ስብስባችን ከጥያቄዎቹ 41 ያህሉን ይዟል፤ እያንዳንዱም መልስና ወደ መማሪያ መጽሐፉ የሚጠቁም ማብራሪያ አለው።

ሙሉውን ፈተና እንዴት እለማመዳለሁ?

በስልክ ቁጥር ነጻ መለያ ይክፈቱ። ሙሉው ፈተና በሰዓት የተገደበ የሙከራ ፈተና ሆኖ ወዲያውኑ ውጤት ይሰጣል፣ በወር 199 ብር የሆነው የ AI አጋዥ ማሻሻያም ያመለጠዎትን ሁሉ ያስረዳዎታል።

የ2012 ዓ.ም. የፊዚክስ ፈተናን በ PDF ማውረድ እችላለሁ?

አዎ፤ ነጻም ነው። የጥያቄ ወረቀቱ አንድ ፋይል ነው፤ የመልስ ቁልፉ ከማብራሪያዎቹ ጋር ሌላ ፋይል ነው፤ ስለዚህ ፈተናውን መጀመሪያ መሞከር ይችላሉ። ያትሟቸው፣ ወይም ዳታ በሌለበት ጊዜ ለክለሳ በስልክዎ ላይ ያስቀምጧቸው።

ይግቡመለያዎን ይክፈቱ