A. Stress
B. Strain
C. Youngs modulus
D. Pressure
✅ The correct answer is option B.
Physics MCQs
Prepare effectively with our Physics MCQs with answers and explanations for exams and job tests. Our collection covers key topics such as mechanics, thermodynamics, optics, electricity and magnetism, modern physics, waves, and quantum theory. These multiple-choice questions are designed for students, competitive exam aspirants, and professionals preparing for NTS, PPSC, FPSC, CSS, PMS, university entry tests, and physics-related job assessments. Practice online to strengthen your concepts, improve problem-solving skills, and excel in exams with our updated Physics MCQs
72. Which is not optically active?
A. Sugar
B. Tartaric acid
C. Water
D. Sodium chlorate
✅ The correct answer is option C.
73. Maximum number of components of a vector may be
A. 1
B. 2
C. 3
D. Infinite
✅ The correct answer is option D.
74. A rubber cord of cross-sectional area 2cm2 has a length of 1m. When a tensile force of 10N is applied the length of the cord increases by 1cm. What is the youngs modulus of rubber?
A. 2×108 Nm-2
B. 5×106 Nm-2
C. 0.5×10-6 Nm-2
D. 0.2×10-6Nm-2
✅ The correct answer is option B.
75. In a double slit experiment, we observe
A. Interference fringes only
B. Diffraction fringes only
C. Both interference and diffraction fringes
D. Polarized fringes
✅ The correct answer is option C.
76. Which one is not correct for a vector A= 2i+2j+3k?
A. Has direction 45° with an x-axis
B. Has magnitude 2
C. Has magnitude 2 and direction °=45° with a y-axis
D. Has magnitude -2
✅ The correct answer is option D.
77. A wire of length L is stretched by a length E when a force F is applied at one end. If the elastic limit is not exceeded the amount of energy stored in the wire is
A. FE
B. (FE)
C. FE2/L
D. FE2
✅ The correct answer is option B.
78. When light incident normally on thin film the path difference depends upon
A. The thickness of the film only
B. Nature of the film only
C. The angle of incidence only
D. All thickness nature and angle of incidence
✅ The correct answer is option D.
79. The resultant of two forces of equal magnitudes is also equal to the magnitude of the forces. The angle between the two forces is
A. 30°
B. 60°
C. 90°
D. 120°
✅ The correct answer is option D.
80. Ratio of the weight of H-atom to that of an electron is approximately
A. 18.336
B. 1836
C. 18360
D. 183.6
✅ The correct answer is option B.