The mean length of an object is 5 cm. Which of the following measurements is most accurate?
Q. The mean length of an object is 5 cm. Which of the following measurements is most accurate? 4.9 cm 4.805 cm 5.25 cm 5.4 cm Answer: 4.9 cm
Unit and Measurement MCQs
The number of significant figures in 600 m is
Q. The number of significant figures in 600 m is 1 2 3 4 Answer: 3
Young’s modulus of steel is 1.9 × 1011 N/m2. When expressed in CGS units of dynes/cm2, it will be equal to (1N = 105 dyne, 1m2 = 104 cm2)
Q. Young’s modulus of steel is 1.9 × 1011 N/m2. When expressed in CGS units of dynes/cm2, it will be equal to (1N = 105 dyne, 1m2 = 104 cm2) 1.9 × 1010 1.9 × 1011 1.9 × 1012 1.9 × 1013 Answer: 1.9 × 1012
You measure two quantities as A = 1.0 m ± 0.2 m, B = 2.0 m ± 0.2 m. We should report correct value for √AB as
Q. You measure two quantities as A = 1.0 m ± 0.2 m, B = 2.0 m ± 0.2 m. We should report correct value for √AB as: 1.4 m ± 0.4 m 1.41m ± 0.15 m 1.4m ± 0.3 m 1.4m ± 0.2 m Answer: 1.4m ± 0.2 m
The numbers 2.745 and 2.735 on rounding off to 3 significant figures will give
Q. The numbers 2.745 and 2.735 on rounding off to 3 significant figures will give 2.75 and 2.74 2.74 and 2.73 2.75 and 2.73 2.74 and 2.74 Answer: 2.74 and 2.74
The numbers 2.745 and 2.735 on rounding off to 3 significant figures will give Read More »
The sum of the numbers 436.32, 227.2 and 0.301 in appropriate significant figures is
Q. The sum of the numbers 436.32, 227.2 and 0.301 in appropriate significant figures is 663.821 664 663.8 663.82 Answer: 664
The sum of the numbers 436.32, 227.2 and 0.301 in appropriate significant figures is Read More »
What is the unit for measuring the amplitude of a sound?
Q. What is the unit for measuring the amplitude of a sound? Decibel Coulomb Hum Cycles Answer: Decibel
What is the unit for measuring the amplitude of a sound? Read More »
One watt hour contains how many joules?
Q. One watt hour contains how many joules? 3.6 ✕ 108 J 3.6 ✕ 102 J 3.6 ✕ 103 J 10-3 J Answer: 3.6 ✕ 103 J
The surface tension of a liquid is 70 dyne/cm. In MKS system its value is?
Q. The surface tension of a liquid is 70 dyne/cm. In MKS system its value is? 70 N/m 7 ✕ 10-2 N/m 7 ✕ 102 N/m 7 ✕ 103 N/m Answer: 7 ✕ 10-2 N/m
The surface tension of a liquid is 70 dyne/cm. In MKS system its value is? Read More »
The dimensional formula for Planck’s constant is
Q. The dimensional formula for Planck’s constant is [MLT] [ML2T-1] [M2L2T-1] [ML1T-1] Answer: [ML2T-1]
The dimensional formula for Planck’s constant is Read More »