Chapter 1: Physical World, Measurement & Mathematical Tools (Set-1)

The study of Physics mainly concerns the __________.

Which of the following is not a primary goal of physics?

Which quantity has both magnitude and direction?

The SI base unit of length is the __________.

Dimension of velocity is __________.

If a physical relation is dimensionally inconsistent, it is __________.

The process of comparing a measurement to a standard is called __________.

A systematic error is best described as __________.

The uncertainty that varies unpredictably from one measurement to another is called __________.

Which of the following reduces random errors the most?

A coordinate system that uses (r, θ) to locate a point is called __________.

In 3D Cartesian coordinates, the point (0,0,0) is called the __________.

Conversion from Cartesian (x,y) to polar (r,θ): r equals __________.

The solid angle has SI unit __________.

A full sphere subtends how many steradians?

The small solid angle dΩ on a sphere of radius r corresponding to area dA is given by __________.

Space–time symmetry that reverses time coordinate t → −t is called __________.

Under parity (P) transformation, spatial coordinates (x,y,z) transform to __________.

Conservation of linear momentum follows from which symmetry?

Energy conservation is associated with __________.

Which of the following is a conserved scalar in an isolated system?

Dimensions of torque (moment of force) are same as __________.

The least count of a measuring instrument is __________.

If measurement is reported as 2.30 ± 0.05 m, 0.05 is the __________.

The relative error is defined as __________.

Which coordinate system is most convenient for problems with spherical symmetry?

The angle subtended by an arc of length s on a circle of radius r is θ = s/r in __________.

A steradian is analogous to a __________ in 2D.

If a physical law is invariant under rotation, then __________ is conserved.

Units of solid angle are dimensionless because:

Which of the following is not an SI base quantity?

The dimension of electric charge in terms of [M],[L],[T],[I] is __________.

If f(x) has dimensions of length and x is dimensionless, then df/dx has dimensions of __________.

Which of the following is an example of a vector quantity?

A measurement reads 5.00 s with least count 0.01 s. An appropriate way to quote it with uncertainty is __________.

Which of the following changes sign under parity transformation?

The conservation law stating that charge cannot be created or destroyed is called __________.

Which symmetry operation turns a particle into its antiparticle (in many contexts)?

The dimensional formula of pressure is __________.

If two measurements are 10.0 ± 0.2 and 3.0 ± 0.1, the percentage error of the first is __________ (approx).

Which statement about derived units is true?

In cylindrical coordinates (ρ, φ, z), φ corresponds to __________.

Which of the following is conserved in an elastic collision between two particles in an isolated system?

A physical law invariant under time translation suggests:

Solid angle subtended by a cone of half-angle α is 2π(1 − cosα). For α = 90°, solid angle equals __________.

A transformation (x→x+a) is an example of __________.

Which of these is dimensionless?

The slope of a graph of displacement vs. time gives __________.

The physical quantity with dimension [L^3] is __________.

If the fractional uncertainties of two measured quantities x and y are 2% and 3%, the fractional uncertainty in product xy (approx) is __________.