Practise Physics Class 9th MCQs MCQs in General Science. Attempt multiple-choice questions, check answers and revise related subtopics.
Study Physics Class 9th MCQs through multiple-choice questions in General Science. This subtopic contains 91 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.
Use these Physics Class 9th MCQs MCQs to identify the facts, rules or methods you need to revise. Where an explanation is available, work through it and write down why your chosen option was correct or incorrect. Revisit difficult questions after reviewing your notes, then use exam mode for timed practice.
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ایکسلریشن کی ایس آئی یونٹ کیا ہے؟
Answer: m/s²
Explanation The SI unit of acceleration is meters/second^2 ( m/s^2 or ms^-2) Acceleration (a) is defined as the rate of change of velocity. Velocity is a vector quantity, and therefore acceleration is also a vector quantity.
آؤٹ پٹ اور ان پٹ کے تناسب کو ____ کہتے ہیں؟
Answer: Efficiency
Explanation Efficiency is the ratio of output to input , often expressed as a percentage. It represents how much of the input energy is actually converted into useful output energy, with the rest being lost as waste or heat. Key Points: Energy is the ability to do work. Work is the transfer of energy through a force applied over a distance. Power is the rate at which work is done or energy is transferred.
حرارت _____ کی شکل ہے؟
Answer: Energy
Explanation Heat is a form of energy , specifically thermal energy , which is transferred from one body to another due to a temperature difference. It is a type of kinetic energy , where the particles of a substance vibrate or move rapidly, generating heat.
کشش ثقل اشیاء کے درمیان درمیانے درجے کا ______ ہے۔
Answer: Independent
Explanation The gravitational force between two objects is independent of the medium between them. Gravity acts through a vacuum just as it does through a medium like air, water, or solid objects. The presence or absence of a medium does not affect the gravitational force between the objects.
Answer: 9.0 gm/cm^3
Explanation To find the density of the steel balls , we need to use the formula for density: Density = Mass/Volume 1. Calculate the total mass of the steel balls: Each ball has a mass of 27 g, and there are 10 balls. Total mass = 10 x 27 = 270 g 2. Calculate the volume displaced by the steel balls: The initial volume of water is 20 cm^3 The final volume of water is 50 cm^3 The volume displaced by the steel balls is: Volume displaced = 50 cm^3 - 20 cm^3 = 30 cm^3 3. Calculate the density of the steel : Using the total mass and the volume displaced: Density = 270 g / 30cm,^3 = 9.0 g/cm^3 Therefore, the density of the steel is 9.0 g/cm^3.
کوئلہ، گیس اور تیل سب _____ کی مثالیں ہیں؟
Answer: Fossil fuel energy
Explanation Coal, gas, and oil are all examples of fossil fuels , which are energy resources formed from the remains of ancient plants and animals over millions of years. Fossil fuels are non-renewable sources of energy. Additional Information: Tidal energy is energy generated from ocean tides Nuclear energy is energy generated from the nucleus of atoms Biomass energy is energy generated from organic matter (plants, wood, waste)
پہلا سائنسدان کون تھا جس نے کشش ثقل کا تصور دیا؟
Answer: Newton
Explanation The first scientist who gave the concept of gravitation was Sir Isaac Newton. He published his groundbreaking work , "Universal Law of Gravitation," in 1687. It explained how gravity works and how it affects objects on Earth and in the universe.
نیوٹن کا قوّت ثقل کا قانون نیوٹن کے ______ قانون حرکت سے مطابقت رکھتا ہے۔
Answer: 3rd
Explanation The gravitational force between two masses is mutual ; each mass exerts an equal and opposite force on the other,. It aligns with Newton's 3rd law of motion : for every action, there is an equal and opposite reaction.
اسپرنگ کے مستقل کی اکائی کیا ہے؟
Answer: Nm^-1
Explanation The spring constant (k) represents the force required to stretch or compress a spring by a certain distance. The unit of spring constant is Newton per meter (N/m) or Newton per meter^-1 (Nm^-1).
ایک مواصلاتی سیٹلائٹ زمین کے گرد اپنا ایک چکر ______ گھنٹے میں مکمل کرتا ہے۔
Answer: 24
Explanation A communication satellite in a geostationary orbit completes one revolution around the Earth in 24 hours. This is the same amount of time it takes the Earth to rotate once on its axis.
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