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Physics 914 MCQs [All-Courses]

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Physics is a core science subject that deals with the study of matter, energy, motion, force, heat, light, electricity, magnetism, and modern physics concepts. It plays a vital role in competitive exams such as PPSC, FPSC, NTS, OTS, KPPSC, BPSC, AJKPSC, CSS, and PMS, where questions test conceptual understanding, numerical problem-solving, and application of laws and formulas. 

All Topics  914

A convex lens of focal length f1 and a concave lens of focal length f2 are placed in contact. The focal length of the combination is_____________?
A f2 + f1
B f2 – f1
C f1f2/f2+f1
D f1f2/f1-f2
Correct Answer: f1f2/f1-f2
Nuclear forces exist between ___________________?
A Proton-proton
B Proton-neutron
C Neutron-neutron
D All of the above
Correct Answer: All of the above
If a convex lens of large aperture fails to converge the light rays incident on it to a single point, it is said to suffer from______________?
A chromatic aberration
B spherical aberration
C both spherical and chromatic
D distortion
Correct Answer: spherical aberration
Transuranic elements have an atomic number_______________?
A Greater than 72
B Greater than 82
C Greater than 92
D Greater than 102
Correct Answer: Greater than 92
The least distance of distinct vision for a normal eye is_______________?
A 15 cm
B 25 cm
C 30 cm
D 40 cm
Correct Answer: 25 cm
The energy liberated when one atom of U-235 undergoes fission reaction is________________?
A 200MeV
B 40MeV
C 30MeV
D 20MeV
Correct Answer: 200MeV
Magnifying power of simple microscope______________?
A increase with increase in focal length
B increase with decrease in focal length
C no effect with decrease or increase with focal length
D list distance of distinct vision
Correct Answer: increase with decrease in focal length
Radioactivity is a ______ (A) Spontaneous activity (B) Chemical property_____________?
A A & B
B B & C
C C & A
D A B & C
Correct Answer: C & A
If an object is placed away from 2f of a converging lens then the image will be_______________?
A real and erect
B virtual and erect
C real and inverted
D virtual
Correct Answer: real and inverted
Electrons_________________?
A Can exist inside the nucleus
B Cannot exist inside the nucleus
C Can exist both inside and outside the nucleus
D Do not know
Correct Answer: Do not know
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