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.
ہوا میں دو چارجز کو ایک خاص فاصلے پر رکھا جاتا ہے۔ جب ان کے درمیان ایک ڈائی الیکٹرک شیٹ رکھی جاتی ہے، تو ان کے درمیان الیکٹرو اسٹاٹک قوت ہوگی؟
A. Remain unchanged
B. Become zero
C. Increase
D. Decrease
Check answer and explanation
Answer: Decrease
Explanation When a dielectric sheet is placed between two charges, the electrostatic force between them will " decrease " because the presence of the dielectric reduces the electric field strength between the charges, thus decreasing the force experienced by them.
Explanation To find the tension in the wire, we can use the formula: T = μv^2 where T is the tension, μ is the linear density, and v is the wave speed. First, we need to find the wave speed . We can do this by analyzing the wave equation: Y = 0.021 sin (x + 30t) The wave speed is given by the coefficient of t, which is 30 m/s. Now we can plug in the values : T = μv^2 = (1.3 x 10^-4 kg/m) x (30 m/s)^2 = 0.12 N So the tension in the wire is 0.12 N.
C. Shield the reactor operator from dangerous radiation
D. Slow down fast neutrons to increase the probability of capture by uranium
Check answer and explanation
Answer: Slow down fast neutrons to increase the probability of capture by uranium
Explanation Moderators (like water or graphite) reduce the speed of fast-moving neutrons. It making them more likely to be absorbed by uranium nuclei. This increases the efficiency of the fission reaction, sustaining a controlled chain reaction in the reactor.
ایک ریوسٹاٹ کو _____ کے طور پر استعمال کیا جاسکتا ہے؟
A. Potential divider
B. None of these
C. Both A and B
D. Variable resistor
Check answer and explanation
Answer: Both A and B
Explanation A rheostat is a type of variable resistor used to control current in a circuit. It can also function as a potential divider by adjusting voltage across components.
کسی دیئے گئے فوری طور پر کسی شے کی رفتار اس کے ______ سے آزاد ہے؟
A. Mass
B. Velocity
C. Acceleration
D. None of these
Check answer and explanation
Answer: Acceleration
Explanation Momentum ( p = m v p = mv ) depends on an object's mass and velocity, but not directly on its acceleration. Acceleration affects how momentum changes over time, but at a given instant, momentum is independent of acceleration.
Explanation Since the two boxes are identical , the weight of the second box is equal to the weight of the first box. The normal force from the table will increase to support the combined weight of both boxes, which is 150 N (2 x 75 N).
B. Its work depends on the end points of every motion, not on the path between them
C. Its work equals the change in the kinetic energy of the particle
D. None of these
Check answer and explanation
Answer: Its work depends on the end points of every motion, not on the path between them
Explanation A conservative force (e.g., gravitational or electrostatic) depends only on the initial and final positions, not on the path taken. The work done by a conservative force can be recovered completely, unlike non-conservative forces (e.g., friction).
بوسنز میں سڈول لہر کے افعال ہوتے ہیں۔ وہ نہیں مانتے ______؟
A. Hund’s Rule of Maximum Multiplicity
B. Pauli’s Exclusion Principle
C. Aufbau principle
D. None of these
Check answer and explanation
Answer: Pauli’s Exclusion Principle
Explanation Bosons have symmetrical wave functions and can occupy the same quantum state without restriction. The Pauli Exclusion Principle applies only to fermions, which have antisymmetric wave functions and cannot share the same quantum state.
Explanation Aluminum makes up approximately 8.23% of the Earth's crust by weight. This making it the third most abundant element after oxygen and silicon. It is primarily found in the form of bauxite ore.
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