Practice Test

Q1) Which of the following represents correct dimensions of the coefficient of viscosity ? Show Answer

Q2) Dimensions of universal constant of gravitation is Show Answer

Q3) The unit of plane angle is radian, hence its dimensions are Show Answer

Q4) Using the principle of homogeneity of dimensions, find which of the following relation is correct ? Show Answer

Q5) The radius of the earth is 6400 km, the order of magnitude is Show Answer

Q6) One micron is related to centimeter as Show Answer

Q7) If momentum (P), area (A) and time(T) are assumed to be fundamental quantities, then energy has dimensional formula Show Answer

Q8) The number of seconds in a day and expressed it in order of magnitude are Show Answer

Q9) If the unit of length is halved and that of mass is doubled then dimensions of force is Show Answer

Q10) The atomic , molecular and nuclear phenomenon are the parts of _____ domain. Show Answer

Q11) Nano size of gold has _____ colour. Show Answer

Q12) Maxwell's equation relate to Show Answer

Q13) _____ is needed for the experimental verification of various theories. Show Answer

Q14) The reference standard used for the measurement of a physical quantity is called Show Answer

Q15) Which of the following is NOT a characteristic of a good unit ? Show Answer

Q16) Units are classified into ___ groups. Show Answer

Q17) F.P.S means Show Answer

Q18) A set of fundamental and derived units is known as Show Answer

Q19) ______ is the unit for mass in metric or M.K.S system. Show Answer

Q20) S.I system of unit contain ____ supplementary unit. Show Answer

Q21) In which of the following system, scientific data can be exchanged between different parts of the world ? Show Answer

Q22) Out of the following units, which is NOT a fundamental unit ? Show Answer

Q23) Which of the following is NOT a derived unit ? Show Answer

Q24) Which of the following is the CORRECT way of writing units ? Show Answer

Q25) To measure the distance of a planet from the earth ____ method is used. Show Answer

Q26) The mass of the body depends only on Show Answer

Q27) In cesium atomic clock _____ is used. Show Answer

Q28) A ____ is the interval from one noon to the next noon. Show Answer

Q29) Light year is a unit for the measurement of Show Answer

Q30) Which of the following quantity is expressed as force per unit area ? Show Answer

Q31) The SI unit of luminous intensity is Show Answer

Q32) Which of the following is a supplementary unit ? Show Answer

Q33) Out of the following pair, which one does NOT have identical dimensions ? Show Answer

Q34) Which of the following equation is dimensionally correct ? Show Answer

Q35) If the unit of length and force are increased to four times, how many times the unit of energy will increase ? Show Answer

Q36) The dimensional formula for impulse is the same as dimensional formula for Show Answer

Q37) Checking the correctness of physical equations using the method of dimensions is based on Show Answer

Q38) A unitless quantity Show Answer

Q39) Which of the following is NOT dimensionless quantity ? Show Answer

Q40) Dimensional equation CANNOT be used Show Answer

Q41) The value of the magnitude rounded off to the nearest integral power of 10 is called Show Answer

Q42) Figure which is of some significance but it does not necessarily denote certainty is defined as Show Answer

Q43) The number of significant figures in 0.0009 is Show Answer

Q44) The number of significant figures in 0.400 is Show Answer

Q45) The order of magnitude of 4.9 and 51 are Show Answer

Q46) Significant figures depends upon the ______ of the measuring instrument. Show Answer

Q47) The difference between the true value and measured value is called Show Answer

Q48) If the pointer of the voltmeter is not exactly at the zero of the scale, the error is called Show Answer

Q49) Accidental error can be minimized by Show Answer

Q50) Instrumental error can be caused due to Show Answer

Q51) Error due to non-removal of parallax between pointer and its image in case of magnetic compass needle causes Show Answer

Q52) Instrumental error can be minimized by Show Answer

Q53) The magnitude of the difference between mean value and each individual value is called Show Answer

Q54) Estimate the mean absolute error from the following data.
20.17, 21.23, 20.79, 22.07, 21.78 Show Answer

Q55) The least count of a screw gauge is 0.005 cm. The diameter of a wire is 0.020 cm as measured by it. The percentage error in measurement is Show Answer

Q56) The percentage error in the measurement of radius r of a sphere is 0.1% then the percentage error introduced in the measurement of volume is Show Answer

Q57) The percentage error in the measurement of mass of a body is 0.75% and the percentage error in the measurement of its speed is 1.85%. Then the percentage error in the measurement of its kinetic energy is Show Answer

Q58) Thickness of the paper measured by micrometer screw gauge of least count 0.01 mm is 1.03 mm, the percentage error in the measurement of thickness of paper is Show Answer

Q59) Zero error of an instrument introduces Show Answer

Q60) The physical quantity having the same unit in all the systems of unit is Show Answer

Q61) State the number of significant figures in 6.032 J Show Answer

Q62) The number of significant figures in 0.0500 is Show Answer

Q63) In the reading 2.614 cm of measurement, only uncertain figure is Show Answer

Q64) The answer of (9.15 + 3.8) with due regards to significant figure is Show Answer

Q65) Who gave the quantum model of an atom ?
Show Answer

Q66) Which of the following set have different dimensions ?
Show Answer

Q67) which of the following pairs of physical quantities has different dimensions? Show Answer

Q68) If L and R denote inductance and resistance, the dimensions of L/R are: Show Answer

Q69) Which of the following pairs does not have same dimensions? Show Answer

Q70) The dimensional representation for Stefan's constant is: Show Answer

Q71) The density of a cube is measured by measuring its mass and length of side. If the maximum error in their measurement is 3% and 2% respectively, the maximum error in the measurement of density is: Show Answer

Q72) Error in the measurement of radius of sphere is 1%, the error in the measurement of volume is: Show Answer

Q73) The percentage errors in the measurement of mass and speed are 2% and 3% respectively, how much will be the maximum error in the measurement of K.E.? Show Answer

Q74) If force, length and time are the fundamental units, then the dimensional formula for mass would be: Show Answer

Q75) Which of the following represents a unified atomic mass unit (1u) ? Show Answer

Q76) The formula for percentage error is : Show Answer

Q77) If the period of vibration of the prongs of fork depends upon density of the material,Young's modulus and the length of the prongs, the expression of time period is (K is a constant ): Show Answer

Q78) If the period of vibration of the prongs of a fork depends upon density of the material,Young's modulus and the length of The prongs,the expressions of time period is (k is a constant):
Show Answer

Q79) Dimension of magnetic moment of a current carrying loop are: Show Answer

Q80) In a particular system, the units of length, mass and time are 10 cm,10g, 0.1s respectively. The unit of force in this system is : Show Answer

Q81) The dimensions of solar constant are : Show Answer

Q82) If K is the kinetic energy, v the velocity and T the time and they are taken to be fundamental units then units of surface tension will be : Show Answer

Q83) The units of poynting vector are : Show Answer

Q84) Identify the pair having identical dimensions. Show Answer

Q85) The fundamental, physical quantities that have same dimensions in the dimensional formulae of torque and angular momentum are: Show Answer

Q86) If pressure P, velocity V and time t are taken as fundamental physical quantities, the dimensional formula of the force is : Show Answer

Q87) Consider a new system of units in which c ( speed of light in vacuum),h (Planck's constant) and G ( gravitational constant) are taken as fundamental units. which of the following would correctly represent mass in this new system ? Show Answer

Q88) A vernier calliper has its main scale of 10 cm equally divided into 200 equal parts. Its vernier scale of 25 divisions coincides with 12 mm on the main scale.The least count of the instrument is : Show Answer

Q89) If R is Rydberg constant , h is Planck's constant and c is the velocity of light, then Rhc has the same dimensional formula as that of : Show Answer

Q90) What will be The unit of time in that system in which unit of length is m, unit of mass is kg and unit of force is kg wt? Show Answer

Q91) Which of the following quantities is undetectable by physical means but is very important for the conceptual understanding of some branch of physics? Show Answer

Q92) The damping force on an oscillating particle is observed to be proportional to velocity.The constant of proportionality can be measured in S.I units: Show Answer

Q93) If energy (E),momentum (p) and force (F) are selected the fundamental units,the dimensions of mass are : Show Answer

Q94) The number of significant figures in 3400 is : Show Answer

Q95) Dimensional formula of the Hall coefficient is : Show Answer

Q96) If G,c and h are the fundamental constants of physics, then the unit of time is expressed as: Show Answer

Q97) Which one of the following groups have quantities that do not have the same dimensions? Show Answer

Q98) If force,length and time are taken as fundamental units,then dimensional formula of mass is : Show Answer

Q99) Numerical value of magnitude of a physical quantity is : Show Answer

Q100) If velocity (V), time (T) and force (F) were chosen as fundamental quantities, the dimensions of mass will be: Show Answer

Q101) Which of the following pairs does not have similar dimensions? Show Answer

Q102) The length and breadth of a metal sheet are 3.124 m and 3.002 m respectively.The area of the sheet upto four correct significant digits is: Show Answer

Q103) The dimensions of the electric susceptibility are: Show Answer

Q104) The dimensional formula for coefficient of restitutions : Show Answer

Q105) The dimensions of e.m.f in M.K.S. is Show Answer

Q106) The quantity that has dimensions of time is : Show Answer

Q107) If energy (E) velocity (v) and force (F) be taken as fundamental quantity, then the dimensional formula of mass will be: Show Answer

Q108) An object is moving through the liquid.The viscous damping force acting on it is proportional to the velocity.Then dimensional formula of constant of proportionality is : Show Answer

Q109) If F, T and V denote for Force,Time and Velocity, then the dimensional formula for mass 'M' is : Show Answer

Q110) Length cannot be measured by : Show Answer

Q111) The physical quantities not having same dimensions are : Show Answer

Q112) Using mass (M), Length (L), time (T) and current (A) as fundamental quantities, the dimensional formula of permeability is : Show Answer

Q113) Pick out the wrong pair : Show Answer

Q114) The instrument to measure time is : Show Answer

Q115) The length,breadth and thickness of a block are given by l = 12 cm ,b = 6 cm and t = 2.45 cm. The volume of the block according to the idea of significant figures should be : Show Answer

Q116) The dimensional formula of light year is : Show Answer

Q117) Which of the following pairs does not have similar dimensions? Show Answer

Q118) pressure gradient has the same dimensions as that of : Show Answer

Q119) Using mass (M),length (L),time (T) and electric current (A) as fundamental quantities, the dimensions of permittivity will be: Show Answer

Q120) Which of the following set have different dimensions ? Show Answer

Q121) Out of the following pair, which one does NOT have identical dimensions ? Show Answer

Q122) The magnetic momentum has dimensions of: Show Answer

Q123) If the error in the measurement of radius of a sphere is 2%, then the error is the determination of volume of the sphere will be Show Answer

Q124) Which two of the following five physical parameters have the same dimensions?
(a) energy density
(b) refractive index
(c) dielectric field
(d) Young's modulus
(e) magnetic field Show Answer

Q125) Dimensions of Resistance in an electrical circuit, in terms of dimensions of mass M, of length L, of time T and of current I, would be: Show Answer