\( [L^{-1}M^1T^{-2}] \)
\( [L^2M^1T^{-2}] \)
\( [L^1M^1T^{-1}] \)
Step 1: Surface tension is defined as the force per unit length: \[ T = \frac{{Force}}{{Length}}. \] The dimensional formula of force is: \[ [F] = M L T^{-2}. \] By dividing force by length (\( L \)), we obtain the dimensional formula for surface tension: \[ [T] = M L^{-1} T^{-2}. \] Step 2: After comparing with the given options, the correct answer is option (d).
A temperature difference can generate e.m.f. in some materials. Let $ S $ be the e.m.f. produced per unit temperature difference between the ends of a wire, $ \sigma $ the electrical conductivity and $ \kappa $ the thermal conductivity of the material of the wire. Taking $ M, L, T, I $ and $ K $ as dimensions of mass, length, time, current and temperature, respectively, the dimensional formula of the quantity $ Z = \frac{S^2 \sigma}{\kappa} $ is:
A quantity \( X \) is given by: \[ X = \frac{\epsilon_0 L \Delta V}{\Delta t} \] where:
- \( \epsilon_0 \) is the permittivity of free space,
- \( L \) is the length,
- \( \Delta V \) is the potential difference,
- \( \Delta t \) is the time interval.
The dimension of \( X \) is the same as that of:
Explain the construction of a spherical wavefront by using Huygens' principle.
The slope of the tangent to the curve \( x = \sin\theta \) and \( y = \cos 2\theta \) at \( \theta = \frac{\pi}{6} \) is ___________.