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
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
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 »
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 »
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 »
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
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 »
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 »
Q. At 4° C, the density of water is equal to 10-3 kg m-3 10-2 kg m-3 10 kg m-3 103 kg m-3 Answer: 103 kg m-3
