The percentage error in the above problem is
The unit of percentage error is
The decimal equivalent of 1/20 upto three significant figures is
Accuracy of measurement is determined by
A thin copper wire of length L metre increases in length by 2% when heated through 10ºC. What is the percentage increase in area when a square copper sheet of length L metre is heated through 10ºC
In the context of accuracy of measurement and significant figures in expressing results of experiment, which of the following is/are correct (1) Out of the two measurements 50.14 cm and 0.00025 ampere, the first one has greater accuracy (2) If one travels 478 km by rail and 397 m. by road, the total distance travelled is 478 km.
The period of oscillation of a simple pendulum in the experiment is recorded as 2.63 s, 2.56 s, 2.42 s, 2.71 s and 2.80 s respectively. The average absolute error is
The length of a cylinder is measured with a meter rod having least count 0.1 cm. Its diameter is measured with vernier calipers having least count 0.01 cm. Given that length is 5.0 cm. and radius is 2.0 cm. The percentage error in the calculated value of the volume will be
If there is a positive error of 50% in the measurement of velocity of a body, then the error in the measurement of kinetic energy is
If 97.52 is divided by 2.54, the correct result in terms of significant figures is
A student measured the diameter of a small steel ball using a screw gauge of least count 0.001 cm. The main scale reading is 5 mm and zero of circular scale division coincides with 25 divisions above the reference level. If screw gauge has a zero error of -0.004 cm, the correct diameter of the ball is
The pair of quantities having same dimensions is
The density of a material in CGS system of units is 4gcm. In a system of units in which unit of length is 10 cm and unit of mass is 100 g, the value of density of material will be
If the error in the measurement of radius of a sphere is 2%, then the error in the determination of volume of the sphere will be
294. Which two of the following five physical parameters have the same dimensions? 1. energy density 2. refractive index 3. dielectric constant 4. Young’s modulus 5. magnetic field
The ratio of the dimensions of Planck’s constant and that of moment of inertia is the dimensions of
The dimensions of Planck’s constant equals to that of
Which pair do not have equal dimensions?
The density of a cube is measured by measuring its mass and length of its sides. If the maximum error in the measurement of mass and lengths are 3% and 2% respectively, the maximum error in the measurement of density would be
The dimensions of impulse are equal to that of
Which of the following is a dimensional constant?
Percentage errors in the measurement of mass and speed are 2% and 3% respectively. The error in the estimate of kinetic energy obtained by measuring mass and speed will be
A certain body weighs 22.42 g and has a measured volume of 4. 7cc. The possible error in the measurement of mass and volume are 0.01 g and 0.1 cc. Then maximum error in the density will be
Of the following quantities, which one has dimensions different from the remaining three?
