StudentAidUnit 1: Measurements — Mcqs
11th Class Physics · Unit 1: Measurements
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Multiple Choice Questions
1.The purpose of study and discoveries in Physics is:
2.The length of a steel pipe is in between 0.7 m to 0.8 m. Identify from the following, the appropriate instrument to be used for an accuracy of 0.001 m.
- a A micrometer screw gauge
- b A metre rule
- c A ten metres measuring tape
- d A Vernier Calipers
3.The diameter of a steel ball is measured using a Vernier calipers and its reading is shown in the figure. What is the diameter of the steel ball?
4.The figure shows the reading on a micrometer screw gauge used to measure diameter of a thin rod. One complete turn of the thimble is 0.50 mm and there are 50 lines on the circular scale. The diameter of the rod is:
- a 3.67 mm
- b 3.17 mm
- c 4.17 mm
- d 4.20 mm
5.The number of significant figures of a measurement are defined as:
6.The number of significant figures in the measured mass 2500.0 kg is:
7.The sum 12 kg + 2.02 kg + 5.1 kg according to appropriate precision is:
8.The answer to appropriate precision for the subtraction (1.126-0.97268) is:
9.The answer of the product (2.8723x1.6) to the appropriate number of significant figures is:
10.The answer to the mathematical division (45.2 × 6.0) in appropriate number of significant figures is:
11.The answer to the following mathematical operation 24.4 m x 100 m / 5.0 m to the appropriate number of significant figures is:
12.The ratio of the dimensions of force and energy is:
13.Identify which pair from the following does not have identical dimensions.
14.The following figures are of the same Vernier calipers. Figure (1) shows the reading when the jaws are closed while Fig. (2) shows the reading when a solid cylinder is placed between the jaws. The length of the cylinder is:
15.The least count of an instrument determines:
16.A measuring tape has been graduated with a minimum scale division of 0.2 cm. The allowed reading using this tape may be:
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SI Units
1.SI unit is built up by how many kinds of units:
2.SI unit of intensity of light is:
3.SI unit of force:
4.SI unit of angular momentum are:
5.SI unit of angular velocity are:
6.SI unit of electric current:
Physical Quantities
7.Physical quantities are often divided into:
Derived Units
8.The unit of pressure in base unit is:
9.The unit of pressure is:
- a Nm^{-2}
- b Nm
- c N^{2}m^{-1}
- d N^{2}m
Prefixes
10.One centi is equal:
11.One kilo mean:
Scientific Notation
12.The scientific notation of number 0.0023 is expressed:
Significant Figures
13.Significant figure in 8.70 x 10^{4} kg are:
14.The value 56.8546 can be rounded off up to three significant figures:
15.When rounded off upto three significant figures the value 6.835 is written as:
16.The sum of three numbers, 2.7543, 4.10 and 1.273, up-to correct decimal place is:
17.Significant figures in 0.0004813 are:
Uncertainty
18.Uncertainty may occur due to:
19.For total assessment of uncertainty in the final result obtained by multiplication and division:
Precision
20.A precise measurement is the one which has:
- a Greater precision
- b Less precision
- c Medium precision
- d More % error
Power factor of assessment of uncertainty
21.The percentage uncertainty in measurement of mass and velocity are 2% and 3%, the maximum uncertainty in the measurement of kinetic energy is:
Dimension
22.The dimensions of acceleration are:
23.The dimensions of weight are:
24.The dimensions of angular momentum are:
25.The Dimension of frequency is:
26.The Dimensions of moment of Inertia are:
27.The dimension of power is:
- a [ML^{2}T^{-2}]
- b [ML^{2}T^{-1}]
- c [ML^{2}T^{-1}]
- d [MLT^{-1}]
28.The dimensionally correct equation of E is:
29.Dimensions of viscosity are:
- a [ML^{-1}T^{-1}]
- b [ML^{2}T^{-1}]
- c [ML^{-1}T^{-1}]
- d [ML^{-1}T^{-2}]
30.Dimension of relation mc^{2} are equal to dimension of:
31.[M^{0}LT^{-1}] Refers to:
32.Which pair has same unit:
Light year
33.One light year is equal to in metres:
Travel time of light
34.The time taken by the light to reach from sun to earth is: