Physics Class 9th MCQs MCQs - General Science Practice | PakExamPoint
Practise Physics Class 9th MCQs MCQs in General Science. Attempt multiple-choice questions, check answers and revise related subtopics.
Physics Class 9th MCQs MCQs and revision practice
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.
Explanation G is the gravitational constant , also known as the universal gravitational constant. It is a fundamental constant of nature that describes the strength of gravitational attraction between objects. The currently accepted numerical value of G is 6.673 × 10^-11 Nm^2 kg^-2.
ایک جسم معمولی جھکاؤ کے بعد مستحکم توازن میں ہے اگر اس کا مرکز ثقل _____؟
A. Remains above the point of contact
B. Remains on one side of point of contact
C. Is at lowest position
D. Passes over the point of contact
Check answer and explanation
Answer: Remains above the point of contact
Explanation When a body is tilted slightly , if its center of gravity remains above the point of contact , it will tend to return to its original position , restoring equilibrium. This is a characteristic of stable equilibrium. Key Points : A body is in unstable equilibrium after slight tilt if its center of gravity remains above the point of contact. A body is in neutral equilibrium when its center of gravity remains at same height.
مصنوعی سیاروں کو مدار میں ڈالنے کے لیے استعمال کیا جاتا ہے۔ ____
A. Helicopter
B. Aeroplane
C. None of these
D. Rocket
Check answer and explanation
Answer: Rocket
Explanation Rockets are used to put satellites into orbit around the Earth. Rockets provide the necessary thrust and velocity to overcome the Earth's gravitational pull and reach the desired altitude and orbit.
Explanation The rate of evaporation can be increased by: Decreasing atmospheric pressure Increasing temperature Decreasing humidity Increasing the surface area of the liquid
مقررہ حجم کے کنٹینر میں گیس کو گرم کیا جاتا ہے۔ گیس کے مالیکیولز کا کیا ہوتا ہے؟
A. They move further apart
B. They collide less frequently
C. They move faster
D. They expand
Check answer and explanation
Answer: They move faster
Explanation When a gas is heated in a container of fixed volume , the molecules of the gas: Move faster (their kinetic energy increases , causing them to move more rapidly) Collide more frequently with the container walls (resulting in increased pressure) Do not expand (the container volume is fixed) Do not move further apart (the density of the gas remains the same, as the volume
متوازی قوتوں کا ایک جوڑا جس میں قوت کی مختلف لکیریں ہوتی ہیں _______؟
A. Unstable equilibrium
B. A couple
C. Equilibrium
D. Torque
Check answer and explanation
Answer: A couple
Explanation A pair of unlike parallel forces (forces that act in opposite directions) with different lines of force produce a couple. It is also known as a moment or torque. This is a rotational force that tends to cause rotation around a pivot point or axis.
Explanation To find the area of the chip wrapper , you multiply the length by the width: Area = Length x Width = 4.5 cm x 5.9 cm = 26.55 cm^2 So, the area of the chip wrapper is 26.55 cm^2.
Explanation Newton is a unit of force , not pressure. The units of pressure are: Pascal (Pa) is the SI unit of pressure. Bar is a common unit of pressure, equal to 100,000 Pa. Atmosphere (atm) is a unit of pressure , equal to 101,325 Pa.
زمین کی طرف گرنے والی گیند کی حرکت _____ کی وجہ سے ہے؟
A. Gravitational force
B. Both 'a' and 'b’
C. Weightlessness
D. Acceleration due to gravity
Check answer and explanation
Answer: Gravitational force
Explanation The motion of a falling ball towards Earth is due to the gravitational force. Gravitational force is the force that attracts the ball towards the Earth, causing it to accelerate downwards.
Explanation To find the acceleration of the sledge , we can use Newton's second law of motion: F = ma, where F is the net force acting on the sledge , m is its mass, and a is its acceleration. First, we need to find the net force acting on the sledge . The force applied by the man is 60 N, and the force of friction is 20 N, so the net force is : F = 60 N - 20 N = 40 N Next, we can plug in the values to Newton's second law: 40 N = (25 kg) × a To find the acceleration, we can divide both sides by the mass: a = 40 N / 25 kg = 1.6 ms^-2 Therefore, the acceleration of the sledge is 1.6 ms^-2.
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