የ12ኛ ክፍል ውጤት ወጥቷል፤ ውጤትዎን የሚያዩበት መንገድ

ያለፉ ፈተናዎች

የፊዚክስ መግቢያ ፈተና፣ 2018 ዓ.ም. (2026)

ተማሪዎች በ2018 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

  • 2018 ዓ.ም. (2026)

    የፈተና ዓመት

  • 55 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 2

During a charging process by induction, a positively charged rod is brought closed to a neutral metal sphere mounted on an insulated stand without touching it. Then, the metal sphere:

  1. A.becomes positively charged, whenever it is grounded.
  2. B.loses some electrons, whenever it is grounded.
  3. C.gains some electrons, whenever it is grounded.
  4. D.gains some protons whenever it is grounded.
መልሱን እና ማብራሪያውን ይመልከቱ

መልስ፦ C gains some electrons, whenever it is grounded.

ለምን

During induction, when a positively charged rod is brought near a neutral metal sphere and the sphere is grounded, free electrons from the ground flow to the sphere to neutralize the positive charge on the side opposite the rod, making the sphere gain electrons.

ጥያቄ 3

A positively charged rod is brought near to a neutral electroscope A and a negatively charged rod is brought near to a neutral electroscope B. What will happen to the gold foils of the electroscopes? The gold foils of:

  1. A.both electroscopes attract each other.
  2. B.both electroscopes repel each other.
  3. C.electroscope A repels and that of B attracts each other.
  4. D.electroscope A attract and that of B repels each other.
መልሱን እና ማብራሪያውን ይመልከቱ

መልስ፦ B both electroscopes repel each other.

ለምን

When any charged rod (whether positive or negative) is brought near a neutral electroscope, charges are induced on the leaves. Since both leaves receive like charges, they repel each other.

ጥያቄ 4

A particle moving with a speed of v0 to the right starts accelerating uniformly with acceleration a. The total distance covered by the particle during the time interval t is s. Assuming the right direction is positive, which one of the following equations enables us to calculate the time t in terms of v0, a and s?

  1. A.t= [ -v0+ √(v02+ 2as) ] /a
  2. B.t= [ -v0+ √(v02+ 2as) ] / 2a
  3. C.t= [v0+ √(v02+ 2as) ] /a
  4. D.t= [v0- √(v02+ 2as) ] / 2a
መልሱን እና ማብራሪያውን ይመልከቱ

መልስ፦ A t= [ -v0+ √(v02+ 2as) ] /a

ለምን

Using the kinematic equation: s = v0t + (1/2)at2. Rearranging gives the quadratic equation: (a/2)t2 + v0t - s = 0. Solving for t using the quadratic formula yields the positive root: t = [ -v0 + √(v02 + 2as) ] / a.

ጥያቄ 5

The figure shown below represents the position-time graph of uniformly accelerated ball in a straight line. The instantaneous velocity of the ball at point x is equal to: [Figure: A position-time graph with a vertical axis labeled Position (m) and a horizontal axis labeled Time (s). The vertical axis has three marked points from bottom to top: S1, S2, and S3. The horizontal axis has three marked points from left to right: t1, t2, and t3, with dashed vertical lines extending upward from each to a curve. A curved line representing motion starts at position S1 at time t1 and rises to position S3 at time t3. On the curve, a marked point labeled x corresponds to position S2 and time t2, with dashed lines going from point x to S2 on the vertical axis and t2 on the horizontal axis.]

  1. A.the average velocity during the time interval betweent1andt3.
  2. B.the ratio of the position at x (s2) to the timet2.
  3. C.the total distance travelled to the total time,t3-t1.
  4. D.the slope of the tangent line at point x.
መልሱን እና ማብራሪያውን ይመልከቱ

መልስ፦ D the slope of the tangent line at point x.

ለምን

By definition, the instantaneous velocity of a moving object at any point on a position-time graph is equal to the slope of the tangent line drawn at that point.

ጥያቄ 6

A weight of 1000 N suspended from an aluminum wire of length 2.5 m causes a 4.0 × 10-3 tensile strain on the wire. What is the change in length of the aluminum wire?

  1. A.10 cm
  2. B.0.01 cm
  3. C.0.1 cm
  4. D.1 cm
መልሱን እና ማብራሪያውን ይመልከቱ

መልስ፦ D 1 cm

ለምን

Tensile strain is defined as ΔL / L. Therefore, ΔL = strain × L = (4.0 × 10-3) × 2.5 m = 0.01 m = 1 cm.

ጥያቄ 7

For a coil placed in a variable magnetic field, Lenz's law states that the direction of the induced current in the coil is in such a way as to:

  1. A.oppose the flux change through the coil.
  2. B.make the flux through the coil zero.
  3. C.increase the flux through the coil.
  4. D.decrease the flux through the coil.
መልሱን እና ማብራሪያውን ይመልከቱ

መልስ፦ A oppose the flux change through the coil.

ለምን

Lenz's Law states that the direction of the induced current in a conductor is such that it creates a magnetic field opposing the change in the magnetic flux that induced it.

ሙሉውን ፈተና በ PDF ያውርዱ

በዚህ ስብስብ ያሉት 55 ጥያቄዎች ሁሉ እንደ ታትሞ የወጣ ፈተና፣ የመልስ ቁልፉም ከ55 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 የተማሪ 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

2017 ዓ.ም. (2025)2016 ዓ.ም. (2024)2015 ዓ.ም. (2023)2014 ዓ.ም. (2022)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 የ2018 ዓ.ም. የፊዚክስ መግቢያ ፈተና ጥያቄዎች ናቸው?

አዎ። ተማሪዎች በ2018 ዓ.ም. (2026) ከተፈተኑበት ብሔራዊ የዩኒቨርሲቲ መግቢያ የፊዚክስ ፈተና የተወሰዱ ናቸው። ስብስባችን ከጥያቄዎቹ 55 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።

የ2018 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።

ግባመለያዎን ይክፈቱ