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.
ایک شے مستقل رفتار سے دائرے میں حرکت پذیر ہے ______؟
A. Must have only one force acting on it
B. None of these
C. Is held to its path by centrifugal force
D. Has an acceleration of constant magnitude
Check answer and explanation
Answer: Has an acceleration of constant magnitude
Explanation An object in uniform circular motion experiences centripetal acceleration, which always points toward the center of the circle. The magnitude of this acceleration remains constant , but its direction continuously changes.
ہیرے کی ساخت میں کاربن کی ممنوعہ توانائی کا فرق ______ ہے؟
A. None of these
B. 1eV
C. 5.5eV
D. 0.7eV
Check answer and explanation
Answer: 5.5eV
Explanation The forbidden energy gap of carbon in a diamond structure is approximately 5.5 eV. This making it a wide-bandgap material. This large gap explains its insulating properties at room temperature.
B. From which light rays diverge but do not pass through
C. Toward which light rays converge and pass through
D. Toward which light rays converge but do not pass through
Check answer and explanation
Answer: From which light rays diverge but do not pass through
Explanation A virtual image is formed when light rays appear to diverge from a point but do not actually pass through it. It is seen in plane mirrors and convex lenses/mirrors when the object is within the focal point.
Explanation A four-level laser is a type of laser that has four energy levels involved in the lasing process. The He-Ne laser ( Helium-Neon laser ) is a common example of a four-level laser. It works by exciting helium atoms, which then transfer their energy to neon atoms, causing them to emit laser light.
ایک الیکٹران بجلی اور مقناطیسی میدان میں آگے بڑھ رہا ہے۔ یہ ______ سے توانائی حاصل کرے گا؟
A. Electric field
B. Magnetic field
C. Both of these
D. None of these
Check answer and explanation
Answer: Electric field
Explanation Electric Field: An electric field exerts a force on an electron that can be in the same direction as its motion. When this force is in the direction of motion, the electron accelerates, its speed increases, and its kinetic energy is gained from the electric field. The work done by the electric field converts potential energy into kinetic energy. Magnetic Field: A magnetic field exerts a force on a moving charge that is always perpendicular to the charge's velocity. Because this force is perpendicular to the motion, it changes the direction of the electron's motion but not its speed or kinetic energy. Therefore, the electron does not gain energy from t he magnetic field.
Explanation The equivalent resistance (R_eq) of the parallel combination : R_eq = (4 kΩ × 6 kΩ) / (4 kΩ + 6 kΩ) = 2.4 kΩ The tolerance calculation : Since both resistors have the same relative tolerance (10%) , the resultant parallel combination will also have a tolerance close to 10%.
گونج پر ، مندرجہ ذیل میں سے کون زیادہ سے زیادہ ہے؟
A. Wavelength
B. None of these
C. Frequency
D. Amplitude
Check answer and explanation
Answer: Amplitude
Explanation Resonance occurs when a system vibrates at its natural frequency due to an external periodic force. At resonance, amplitude reaches its maximum value because the energy transfer is most efficient.
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