The time period of a simple pendulum is given by $T = 2\pi\sqrt{\frac{l}{g}} + kx$, where $l$ is the length, $g$ is acceleration due to gravity, and $x$ is displacement. The dimensions of $k$ are:

Light year is a unit of

The unit of permittivity of free space ${\varepsilon _0}$ is

Which of the following system of units is not based on units of mass, length and time alone

The unit of specific resistance is

The damping force of an oscillating particle is observed to be proportional to velocity. The constant of proportionality can be measured in

Which of the following cannot be regarded as an essential characteristic of a unit of measurement?

Which of the following is the smallest unit

newton-second is the unit of

The unit of self inductance of a coil is

The unit of permittivity of free space ${\varepsilon _0}$ is