All MCQs - Lecturer Physics Past Papers and Syllabus Practice | PakExamPoint
Practise All MCQs in Lecturer Physics Past Papers and Syllabus. Attempt multiple-choice questions, check answers and revise related subtopics.
All MCQs and revision practice
Study All through multiple-choice questions in Lecturer Physics Past Papers and Syllabus. This subtopic contains 342 practice questions. Read the wording carefully, compare the options and attempt an answer before checking the solution in learning mode.
Use these All 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.
اگر کوئی شخص ______ اگر زمین پر زیادہ سے زیادہ دباؤ ڈال سکتا ہے تو؟
A. He stands with both feet flat on the ground
B. He stands on the toes of one foot
C. None of these
D. He lies down on the ground
Check answer and explanation
Answer: He stands on the toes of one foot
Explanation Pressure = Force / Area , so reducing the contact area increases pressure. Standing on the toes of one foot minimizes the area , thus exerting maximum pressure on the ground.
بیرونی ٹارک کی عدم موجودگی میں ، جو مقدار محفوظ رہتی ہے وہ _____ ہے؟
A. Mass
B. None of these
C. Angular momentum
D. Linear momentum
Check answer and explanation
Answer: Angular momentum
Explanation According to the law of conservation of angular momentum , if no external torque acts on a system, its angular momentum remains constant. This principle is widely observed in rotational motion , such as a spinning skater pulling in their arms to rotate faster.
A. Equals mass moving at the speed of the light square
B. None of these
C. And mass are closely related
D. Is fundamentally different than mass
Check answer and explanation
Answer: And mass are closely related
Explanation Einstein’s equation E = m c 2 E = mc^2 shows that energy and mass are interchangeable, meaning mass can be converted into energy and vice versa. This principle is fundamental in nuclear reactions , where small amounts of mass release large amounts of energy.
جسمانی مقدار "تسلسل" میں وہی جہت ہے جو ______ کی طرح ہے؟
A. Power
B. Force
C. Momentum
D. None of these
Check answer and explanation
Answer: Momentum
Explanation Impulse is defined as Force × Time (F × t) , and its unit is Ns (Newton-second) . Momentum is Mass × Velocity (m × v) , which also has the unit Ns , meaning both have the same dimensions.
اگر تاریک معاملہ موجود نہیں تھا تو یہ امکان ہے کہ ______؟
A. The universe would begin contracting soon
B. None of these
C. The universe would expand forever
D. The night sky would be brighter
Check answer and explanation
Answer: The universe would begin contracting soon
Explanation Dark matter provides additional gravitational pull, helping galaxies stay bound and influencing cosmic expansion. Without dark matter , gravitational attraction might be weaker, and the universe could slow down its expansion and potentially start contracting.
Explanation Beta particles lose only a small fraction of their energy in a single encounter with matter. They can continue to travel through materials , gradually losing energy over multiple interactions.
Explanation To find the increase in internal energy, we can use the equation: ΔU = Q - W where ΔU is the change in internal energy, Q is the heat energy added (which is the latent heat of vaporization in this case), and W is the work done. Given: Q = 2240 J (latent heat of vaporization of water per gram) W = 168 J (work done in the process of vaporization) Now, we can plug in the values: ΔU = Q - W = 2240 J - 168 J = 2072 J
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