11th class Physics unit 1 MCQs
26. 1 tera = ………:
a. 1012
b. 1015
c. 10-12
d. 1018
27. Which one of the following is not allowed standard prefix?
a. Mega
b. Kilo
c. Micro micro
d. Nano
28. Which of the following is least multiple?
a. Nano
b. Pico
c. Atto
d. Femto
29. One femto is equal to:
a. 10-14
b. 10-12
c. 10-15
d. 10-13
30. One pico is equal to:
a. 10-6
b. 1012
c. 10-16
d. 10-12
31. How many nanometers in a meter?
a. 10-9
b. 1019
c. 10-6
d. 10-19
32. The percentage uncertainty in radius of a sphere is 2%. The totalpercentage uncertainty in the volume of sphere is:
a. 6%
b. 2%
c. 8%
d. 4%
33. Zero error of the instrument is a type of:
a. Personal error
b. Systematic error
c. Random error
d. Classified error
34. For total assessment of uncertainty in the final result obtained bymultiplication and division:
a. % age uncertainties are added
b. Absolute uncertainties are added
c. Error are added
d. Fractional uncertainties are added
35. The absolute uncertainty for vernier callipers of L.C = 0.01cm is:
a. 0.001cm
b. 0.1mm
c. 0.001mm
d. 0.001m
36. In 5.47×19.89 = 108.7983 : answer should be written as:
a. 109
b. 108.8
c. 108.79
d. 108.9
37. In the light of Einstein’s famous equation E=mc2 , the energy for mass 2 kg is equal to:
a. 4×1016 joule
b. 3×108 joule
c. 18×1016 joule
d. 9×1016 joule
38. The number of significant figures in 0.00407 are:
a. 4
b. 2
c. 5
d. 3
39. Significant figures in 8.70×104 kg are:
a. 4
b. 2
c. 5
d. 3
40. Significant figures in 0.0010 are:
a. 3
b. 1
c. 4
d. 2
41. Significant figures in 0.00567 are:
a. 4
b. 2
c. 5
d. 3
42. Significant figures in 0.4060 are:
a. 5
b. 2
c. 6
d. 4
43. Significant figures in 0.0004813 are:
a. 4
b. 8
c. 3
d. 7
44. If we round of 64.34546 up to three significant figures, the best answer is:
a. 64.5
b. 64.3
c. 64.6
d. 64.4
45. The sum of three numbers, 2.7543, 4.10 and 1.273, up-to correct decimalplace is:
a. 8.1273
b. 8.12
c. 8.127
d. 8.13
46. Which of the following is the correct record for the diameter of a wire when measured with a screw gauge of least count of 0.001cm?
a. 2.312 cm
b. 2.3 cm
c. 2.3124 cm
d. 2.31 cm
47. One light year is equal to:
a. 9.5×1015 cm
b. 9.5×10-15 m
c. 9.5×1015 Km
d. 9.5×1015 m
48. The dimension of √l/g is same as that of:
a. Velocity
b. Time
c. Force
d. Energy
49. The dimension of density are:
a. [ML-3]
b. [M2L-2]
c. None of these
d. [M2L-2]
50. The ratio of dimensions of K.E and power is:
a. [1:T-1]
b. 1:1
c. [M] :[T}
d. [T]:1