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.
دائیں رسی پر چلنے والا ______ تک ایک لمبا کھمبہ لے جاتا ہے؟
A. Increase his weight
B. Lower his centre of gravity
C. Raise his centre of gravity
D. Keep his centre of gravity in fixed position
Check answer and explanation
Answer: Lower his centre of gravity
Explanation A tightrope walker carries a long pole to lower their center of gravity, making it easier to balance and maintain equilibrium. By spreading their weight over a larger area (including the pole), they reduce the risk of toppling over.
Explanation Inhibitors are molecules that decrease the activity of enzymes , often by binding to a specific site on the enzyme. Activators are molecules that increase the activity of enzymes , often by binding to a specific site on the enzyme.
Explanation Centrifugal force is a fictitious force that appears to act on an object moving in a circular path, causing it to move away from the center of the circle. It is a result of the inertia of the object , which tends to keep it moving in a straight line.
نیوٹن کا کشش ثقل کا قانون _____ پر ہر دو اشیاء کے درمیان رکھتا ہے؟
A. On Moon
B. On Earth
C. On Universe
D. On Jupiter
Check answer and explanation
Answer: On Universe
Explanation Newton's law of universal gravitation states that every point mass attracts every other point mass by a force acting along the line intersecting both points. This law applies to all objects in the universe , regardless of their size, shape, or composition.
کسی مادے کو مائع سے گیس میں تبدیل کرنے کے لیے حرارت کی مقدار کو _____ کہتے ہیں؟
A. Heat of vaporization
B. All of these
C. Specific heat
D. Latent heat of fusion
Check answer and explanation
Answer: Heat of vaporization
Explanation Heat of vaporization is the amount of heat energy required to convert a substance from its liquid state to its gaseous state, without changing its temperature. This energy is used to break the intermolecular forces between the molecules, allowing them to escape into the gas phase.
Explanation Limiting frictional force (also known as static friction) is greater than: Rolling friction ( because rolling friction is much smaller , as it only opposes the motion of an object that is already rolling) Sliding friction ( which is another term for kinetic friction ) Kinetic friction (which is the frictional force that acts when an object is already moving )
Explanation Steel is more elastic than rubber, glass, and wood. Elasticity refers to the material's ability to return to its original shape after being deformed. Steel has a higher modulus of elasticity (Young's modulus), meaning it can withstand greater stress and still return to its original shape.
ٹھوس کو اس کا درجہ حرارت تبدیل کیے بغیر مائع میں تبدیل کرنے کے لیے حرارتی توانائی کی منتقلی کو ____ کہتے ہیں؟
A. Latent heat of vaporization
B. Specific heat capacity
C. Latent heat of Fusion
D. Latent heat of boiling
Check answer and explanation
Answer: Latent heat of Fusion
Explanation Latent heat of fusion is the energy required to change a solid into a liquid (or vice versa) without changing its temperature. Latent heat of vaporization is the energy required to change a liquid into a gas (or vice versa) without changing its temperature.
Explanation The gravitational field of Earth is a vector field that points towards the center of the Earth. It representing the direction of the gravitational force that the Earth exerts on objects near its surface. This means that the gravitational field is directed towards the Earth, pulling objects towards its center.
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