NCERT Class 11 Physics MCQ Chapter 1 Units of Measurement Solutions, AHSEC Class 11 Physics Multiple Choice Question Answer to each chapter is provided in the list so that you can easily browse throughout different chapters NCERT Class 11 Physics MCQ Chapter 1 Units of Measurement Question Answer and select needs one.
Class 11 Physics MCQ Chapter 1 Units of Measurement
Also, you can read the SCERT book online in these sections NCERT Class 11 Physics Multiple Choice Solutions by Expert Teachers as per SCERT (CBSE) Book guidelines. AHSEC Class 11 Physics MCQ Solutions. These solutions are part of SCERT All Subject Solutions. Here we have given HS 1st Year Physics Objective Type Question Answer for All Subjects, You can practice these here.
Units and Measurement
Chapter: 1
| PART – Ⅰ |
MULTIPLE CHOICE QUESTION ANSWER
1. Which system of units is internationally accepted for measurement?
(i) CGS.
(ii) FPS.
(iii) MKS.
(iv) SI.
Ans: (iv) SI.
2. According to Einstein’s theory, mass and energy are related as:
(i) E = mc
(ii) E = mc2
(iii) E = m/c
(iv) E = m/c2
Ans: (ii) E = mc2
3. The number of significant figures in the number 0.0028 is,
(i) 2
(ii) 4
(iii) 5
(iv) 6
Ans: (i) 2.
4. How many base units are there in the SI system?
(i) 6
(ii) 7
(iii) 9
(iv) 8
Ans: (ii) 7
5. In the SI system, what is the unit for plane angle?
(i) Degree.
(ii) Radian.
(iii) Steradian.
(iv) Gradian.
Ans: (ii) Radian.
6. Which of the following is not the unit of time:
(i) Second.
(ii) Minute.
(iii) Month.
(iv) Light year.
Ans: (iv) Light year.
7. In the SI system, the unit of luminous efficacy is based on which frequency?
(i) 540 × 10¹² Hz
(ii) 460 × 10¹² Hz
(iii) 550 × 10¹² Hz
(iv) 530 × 10¹² Hz
Ans: (i) 540 × 10¹² Hz
8. Atomic and molecular phenomena are dealt with by:
(i) Applied Mechanics.
(ii) Quantum Mechanics.
(iii) Newtonian Mechanics.
(iv) Fluid Mechanics.
Ans: (ii) Quantum Mechanics.
9. What is the symbol for the unit of thermodynamic temperature in SI?
(i) C
(ii) T
(iii) F
(iv) K
Ans: (iv) K.
10. The term “order of magnitude” refers to:
(i) The highest significant figure.
(ii) The exponent in scientific notation.
(iii) The most uncertain digit.
(iv) The least significant digit.
Ans: (ii) The exponent in scientific notation.
11. Who is the Father of Experimental Physics?
(i) Galileo.
(ii) Newton.
(iii) Albert Einstein.
(iv) Neils Bohar.
Ans: (i) Galileo.
12. If x = a + bt + ct2, where x is in metre and t in second, then what is the unit of ‘c’?
(i) m/s
(ii) m/s2
(iii) kgm/s
(iv) m2/s
Ans: (ii) m/s2
13. If a vehicle moves at a speed of 18 km/h, how far does it cover in 1 second in metres?
(i) 2 m.
(ii) 3 m.
(iii) 5 m.
(iv) 7 m.
Ans: (iii) 5 m.
14. What is the distance from the Earth to the Sun if light takes 8 minutes and 20 seconds to travel this distance?
(i) 480 new units of length.
(ii) 500 new units of length.
(iii) 400 new units of length.
(iv) 550 new units of length.
Ans: (ii) 500 new units of length.
15. The pair of quantities having the same dimensions is:
(i) Displacement, velocity.
(ii) Time, frequency.
(iii) Wavelength, focal length.
(iv) Force, acceleration.
Ans: (iii) wavelength, focal length.
