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Class 11 Physics (Part I) Chapter 1 Physical World And Measurement Quiz 2 (25 MCQs)

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1. If the uncertainty in the volume of a solid sphere is 6%, then the uncertainty in the surface area of the sphere is:
2. The dimensions of universal gravitational constant are
3. What is the dimensional formula of torque?
4. The velocity of a particle v at an instant t is given by v=at+bt2. The dimensions of b is
5. What is the percentage error in the measurement of the kinetic energy of a body, if there is a positive error of 50% in the speed of the body
6. The Density of a cube is measured by measuring its mass and length of its sides if the maximum error in the measurement of mass and length are 4% and 3% respectively, the maximum error in the measurement of density will be
7. Which is the correct unit for measuring astronomical distance?
8. The numer of significant figures in 0.086230 is
9. Which of the following has the highest number of significant figures?
10. One nanometer is equal to
11. The vernier of a circular scale is divided into 30 divisions which coincides against 29 main scale divisions. Each main scale divisions is 1/2$^{0}$ The least count of the instrument is
12. The ratio of the height of a man to the radius of the earth is of the order of
13. One of the combinations from the fundamental physical constants is hc/G. The unit of this expression is .....
14. If force (F), velocity (v) and time (T) are taken as fundamental units, then the dimensions of mass are
15. Which of the following measurements is most precise?
16. The Percentage errors in the measurement of mass and speed are 2% and 3% respectively, The error in kinetic energy obtained by measuring mass and speed will be
17. Atomic and molecular phenomena are dealt with by
18. Round off the number 43.752 upto three digit
19. A supposition that is put forward as a probable solution to a natural phenomenon is called a
20. Which of the following is a dimensional constant?
21. The scientific method is
22. The Velocity v of a particle at time t is given by v = at+ b/t+c, where a, b, and c are constants. The dimensions of a, b, and c are respectively
23. If C and R denote capacitance and resistance respectively, then the dimensional formula of CR is
24. Which of the following quantities is expressed as force per unit area?
25. If L = 2.331 cm, B = 2.1 cm, then L + B =?
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