The viscous force $F$ acting on a sphere of radius $r$ moving with velocity $v$ through a fluid of viscosity $\eta$ is given by $F = 6\pi \eta rv + kr^2v^2$. The dimensions of $k$ are:

Electron – volt is the unit of energy (1 eV = 1.6 $imes {10^{ - 19}}J)$. in H-atom, the binding energy of electron in first orbit is 13.6 eV. The same in joule (J) is

$1kWh\; =$

The SI unit of universal gas constant (R) is

The unit of magnetic moment is

Which of the following is not represented in correct unit

Which relation is wrong

A physical quantity u is given by the relation $u = \frac{{{B^2}}}{{2{{\rm{\mu }}_0}}}$ here, B=magnetic field strength ${{\rm{\mu }}_0} =$ magnetic permeability of vacuum.

Which does not have the same unit as others

If the units of M and L are increased three times, then the unit of energy will be increased by

A calorie is a unit of heat and equal 4.2 J. Suppose we employ a system of units in which the unit of mass is $\alpha$ kg, the unit of length is $\beta$ metre and the unit of time is γ sec. In this new system. 1 calorie =