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.
مندرجہ ذیل میں سے کون سا جوہری ٹھوس کے بارے میں غلط بیان ہے؟
A. The composite unit of atomic solids are atoms
B. All atomic solids have high melting points
C. Atomic solids are held together by dispersion forces, metallic bonds, and covalent bond
D. Atomic solids are a type of crystalline solids
Check answer and explanation
Answer: All atomic solids have high melting points
Explanation Atomic solids can have low, moderate, or high melting points depending on the type of bonding (e.g., noble gases with weak dispersion forces have low melting points ). Atomic solids are crystalline solids, and their composite units are atoms arranged in a lattice structure.
Explanation Internal energy is the sum of the kinetic and potential energy of atoms or molecules within a system. It includes translational, rotational, vibrational, and intermolecular potential energy.
اگر چارجز کے درمیان فاصلہ دوگنا ہوجاتا ہے تو ، چارجز کے درمیان کولمب کی طاقت _____؟
A. None of these
B. Distance between the charges
C. One-fourth
D. Halves
Check answer and explanation
Answer: One-fourth
Explanation According to Coulomb’s Law , the electrostatic force F F is inversely proportional to the square of the distance between the charges: F ∝ 1 r 2 F propto frac{1}{r^2} If the distance doubles ( r → 2 r r to 2r ) , the force reduces to one-fourth of its original value: F ′ = F 4 F' = frac{F}{4} .
ایک کروی کنڈکٹر کی صلاحیت عددی طور پر ______ کے برابر ہے؟
A. Diameter
B. None of these
C. Volume
D. Radius
Check answer and explanation
Answer: Radius
Explanation The capacitance (C) of a spherical conductor is given by the formula: C = 4πε₀R , where R is the radius of the sphere. This shows that the capacitance is directly proportional to the radius and independent of volume or surface area.
Explanation Mature red blood cells (RBCs) in mammals lack a nucleus to maximize space for hemoglobin, increasing oxygen-carrying capacity. Other cells like muscle, nerve, and white blood cells have nuclei for their functions.
Explanation To calculate the moment of inertia of the Earth about its diameter, we can use the formula for the moment of inertia of a sphere: I = (2/5)MR^2 where: I = moment of inertia M = mass of the Earth (10^25 kg) R = radius of the Earth (diameter/2 = 12800 km / 2 = 6400 km = 6.4 × 10^6 m) Plugging in the values, we get: I = (2/5) × 10^25 kg × (6.4 × 10^6 m)^2 = (2/5) × 10^25 kg × 4.096 × 10^13 m^2 = 1.6384 × 10^38 kg m^2 ≈ 1.64 × 10^38 kg m^2
روشنی کی ٹرانسورس فطرت کی تصدیق ______ کے رجحان سے ہوئی؟
A. None of these
B. Dispersion of light
C. Polarization of light
D. Diffraction of light
Check answer and explanation
Answer: Polarization of light
Explanation Polarization confirms light is a transverse wave because it involves restricting oscillations to a specific plane . For polarization, light must have oscillating components in different planes. Transverse waves have oscillations perpendicular to the direction of wave propagation, allowing polarization.
Explanation Bohr's quantum condition states that the angular momentum of an electron in a circular orbit is quantized: mvr = nh / 2π where m is the mass of the electron, v is the velocity , r is the radius of the orbit, n is the principal quantum number, and h is Planck's constant .
Answer: To support the role ans view of another person
Explanation " To play second fiddle " means to take a subordinate or supporting role to someone else. It implies assisting or being less important than another person in a situation.
Found a mistake? Use “Report correction” in the practice tool or contact us with the question and a supporting source.