A. 4
B. 3
C. 2
D. None of these
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Related Mcqs:
- Three students measured the length of a needle with meter rod and recorded as : (i) 0.2145m (ii) 0.21m (iii) 0.214m Which one is a correct record ?
- A. Only (i) B. Only (ii) C. Only (iii) D. Both (i) and (ii)...
- An observer shoots parallel to a meter stick at very high (relativistic) speed and finds that the length of meter stick is________________?
- A. greater than one meter B. less than one meter C. one meter D. a foolish question...
- In any measurement the significant figures are______________?
- A. All accurately known and all doubtful digits B. Only accurately known digits C. Only doubtful digits D. All accurately known digits and the first doubtful digit...
- Number of significant figures in 0.0173 is_________________?
- A. 3 B. 4 C. 5 D. 2...
- The number of significant figures in 5.400 is________________?
- A. 3 B. 5 C. 2 D. None...
- The number 76.85 is rounded off up to two significant figures as_____________?
- A. 76.8 B. 77 C. 76.9 D. None of these...
- 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...
- 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...
- 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...
- A wire obeys Hooks law is of length 11 when it is in equilibrium under a tension F1. Its length becomes 12 when the tension is increased to F2. The energy stored in the wire during this process is____________________?
- A. (F1+F2) (121+122) B. (F1+F2) (122-112) C. (F1+F2) (12-11) D. (F1+F2) (12-11)...
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