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.
چلتی شے کو روکنے کے لئے درکار کام کی مقدار ______ کے برابر ہے؟
A. None of these
B. The mass of the object times its acceleration
C. The velocity of the object
D. The kinetic energy of the object
Check answer and explanation
Answer: The kinetic energy of the object
Explanation Work required to stop an object is equal to the change in its kinetic energy (Work-Energy Theorem). Since kinetic energy is given by K E = 1 2 m v 2 KE = frac{1}{2} m v^2 , the work needed to bring the object to rest is equal to its initial kinetic energy.
پی قسم کے سیمی کنڈکٹر جرمینیم کرسٹل کو حاصل کرنے کے لیے، اسے غیر ملکی ایٹموں کے ساتھ ڈوپ کیا جانا چاہیے جن کی ویلینسی _____ ہے؟
A. 3
B. None of these
C. 2
D. 4
Check answer and explanation
Answer: 3
Explanation P-type semiconductors are created by doping with trivalent atoms (valency 3) like boron or indium . It create " holes " by accepting electrons. These holes act as charge carriers , giving the semiconductor its p-type behavior.
انڈس واٹر ٹریٹی کے تحت پاکستان کو مندرجہ ذیل میں سے کونسا دریا دیا گیا؟
A. Indus, Jhelum and Chenab
B. Indus and Jhelum
C. Ravi and Indus
D. None of the above
Check answer and explanation
Answer: Indus, Jhelum and Chenab
Explanation The Treaty allocates the Western Rivers ( Indus, Jhelum, Chenab ) to Pakistan The Eastern River s ( Ravi, Beas, Sutlej ) to India Indus Waters Treaty signed o n September 19, 1960, Between India and Pakistan Treaty was brokered by the World Bank Signed at Karachi by Field Marshal Mohammad Ayub Khan, The then President of Pakistan, J awaharlal Nehru The then I ndian Prime Minister , and Mr. W.A.B. Illif The Treaty is effective from 1st April 1960 Last updated by NS on 06 May 2026
الیکٹرک سرکٹ کی وجہ سے حرارتی اثر ______ کے طور پر لکھا جاتا ہے؟
A. H=IR^2t
B. None of these
C. H=I^2R
D. H=I^2Rt
Check answer and explanation
Answer: H=I^2Rt
Explanation The Joule’s Law of Heating states that heat produced in a conductor is given by H = I²Rt , where I is current, R is resistance, and t is time. This formula explains the conversion of electrical energy into heat in resistors, like in electric heaters and filament bulbs.
کچھ ستاروں سے روشنی ______ کی وجہ سے تعدد میں واضح تبدیلی ظاہر کرتی ہے؟
A. Diffraction
B. Relative motion
C. None of these
D. Reflection
Check answer and explanation
Answer: Relative motion
Explanation The apparent change in frequency of light from stars is due to the Doppler effect . It is caused by their motion relative to Earth. If a star moves toward us , its light shifts to blue (higher frequency), and if it moves away , it shifts to red (lower frequency).
ہائیڈروجن ایٹم میں اعلی ترین تعدد کے فوٹون کی منتقلی جذب _______ ہے؟
A. j = 4 to j = 2
B. j = 1 to j = 2
C. j = 2 to j = 1
D. None of these
Check answer and explanation
Answer: j = 2 to j = 1
Explanation The highest frequency photon corresponds to the largest energy difference between levels in a hydrogen atom . The transition from j = 2 to j = 1 ( Lyman series ) emits the highest energy photon in the ultraviolet region. This meaning absorbing this photon would excite the electron back .
Explanation The average translational kinetic energy of molecules is directly proportional to the temperature (in Kelvin). Since the temperature is increased from 300 K to 750 K , the average translational kinetic energy will also increase by a factor of 750/300 = 2.5. So, the average translational energy at 750 K will be : 6 x 10^-20 J x 2.5 = 1.5 x 10^-19 J
Explanation For maximum range, the angle of projection should be 45° . However, since that's not an option, we need to find the angle closest to 45° . Among the given options: - 35° is closer to 45° than 20°. - 60° is closer to 45° than 70°. However, 35° is closer to 45° than 60°. So, the correct answer is: 35°.