CBSE Class 11 Physics Chapter 1 Physical World Multiple Choice Questions with Answers. MCQ Questions Class 11 Physics Physical World with Answers was Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 11 Physics Physical World MCQs with Answers to know their preparation level.
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MCQ Questions Class 11 Physics Physical World with Answers - Set - 5
Question 1:
The respective number of significant figures for the numbers 23.023, 0.0003 and 2.1 × 10–3 are
(a) 5, 1, 2
(b) 5, 1, 5
(c) 5, 5, 2
(d) 4, 4, 2
Correct Answer – (A)
Question 2 :
The pair of physical quantities that has the different dimensions is :
(a) Reynolds number and coefficient of friction
(b) Curie and frequency of a light wave
(c) Latent heat and gravitational potential
(d) Planck’s constant and torque
Correct Answer – (D)
Question 3 :
A metal sample carrying a current along X-axis with density Jx is subjected to a magnetic field Bz (along z-axis). The electric field Ey developed along Y-axis is directly proportional to Jx as well as Bz.
The constant of proportionality has SI unit.
(a) M2 /A
(b) M3 /AS
(c) m2 /As
(d) AS / M3
Correct Answer – (B)
Question 4 :
Which of the following is the correct decreasing order of the strengths of four fundamental forces of nature ?
(a) Electromagnetic force > weak nuclear force > gravitational force > strong nuclear force
(b) Strong nuclear force > weak nuclear force > electromagnetic force > gravitational force
(c) Gravitational force > electromagnetic force > strong nuclear force > weak nuclear force
(d) Strong nuclear force > electromagnetic force > weak nuclear force > gravitational force
Correct Answer – (D)
Question 5 :
The exchange particles for the electromagnetic force are
(a) gravitons
(b) gluons
(c) photons
(d) mesons
Correct Answer – (C)
MCQ Questions Class 11 Physics Physical World with Answers
Question 6 :
Force F is given in terms of time t and distance x by F = A sin (Ct) + B cos (Dx). Then, dimensions of A/B and C/D are
(a) [M0 L0 T0], [M0 L0 T–1]
(b) [M L T–2], [M0 L–1 T0]
(c) [M0 L0 T0], [M0 L T–1]
(d) [M0 L1 T–1], [M0 L0 T0]
Correct Answer – (C)
Question 7 :
The refractive index of water measured by the relation m = real depth / apparent depth is found to have values of 1.34, 1.38, 1.32 and 1.36; the mean value of refractive index with percentage error is
(a) 1.35 ± 1.48 %
(b) 1.35 ± 0 %
(c) 1.36 ± 6 %
(d) 1.36 ± 0 %
Correct Answer – (A)
Question 8 :
If x = at + bt2, where x is the distance travelled by the body in kilometers while t is the time in seconds, then the unit of b is
(a) km/s
(b) kms
(c) km/s2
(d) kms2
Correct Answer – (C)
Question 9 :
Which of the following statements is/are correct?
I. Strong nuclear force binds protons and neutrons in a nucleus.
II. In twentieth century, silicon chip triggered a revolutionary changes in technology of computer system.
III. The fossil fuels of the planet are dwindling fast and there is urgent need to discover new source of energy.
(a) Only I
(b) Only III
(c) I and II
(d) I, II and III
Correct Answer – (D)
Question 10 :
The field of work of S. Chandrashekar is
(a) theory of black hole
(b) Cosmic rays
(c) theory of relativity
(d) X-rays
Correct Answer – (A)
- NCERT Solutions Class 11 Physics Chapter 1 : Physical world
- NCERT Solutions Class 11 Physics Chapter 2 : Units And Measurements
- NCERT Solutions Class 11 Physics Chapter 3 : Motion In A Straight Line
- NCERT Solutions Class 11 Physics Chapter 4 : Motion In A Plane
- NCERT Solutions Class 11 Physics Chapter 5 : Laws of Motion
- NCERT Solutions Class 11 Physics Chapter 6 : Work Energy Power
- NCERT Solutions Class 11 Physics Chapter 7 : Rotational-Motion
- NCERT Solutions Class 11 Physics Chapter 8 : Gravitation
- NCERT Solutions Class 11 Physics Chapter 9 : Mechanical Properties of Solids
- NCERT Solutions Class 11 Physics Chapter 10 : Mechanical Properties of Fluids
- NCERT Solutions Class 11 Physics Chapter 11 : Thermal Properties of Matter
- NCERT Solutions Class 11 Physics Chapter 12 : Thermodynamics
- NCERT Solutions Class 11 Physics Chapter 13 : Kinetic Theory
- NCERT Solutions Class 11 Physics Chapter 14 : Oscillations
- NCERT Solutions Class 11 Physics Chapter 15 : Waves
