A monochromatic neon lamp with wavelength of 670.5 nm illuminates a photo-sensitive material which has a stopping voltage of 0.48 V. What will be the stopping voltage if the source light is changed with another source of wavelength of 474.6 nm?

Match List - I with List - II.

	List - I		List - II
(a)	$${R_H}$$ (Rydberg constant)	(i)	$$kg\,{m^{ - 1}}{s^{ - 1}}$$
(b)	h (Planck's constant)	(ii)	$$kg\,{m^2}{s^{ - 1}}$$
(c)	$${\mu _B}$$ (Magnetic field energy density)	(iii)	$$\,{m^{ - 1}}$$
(d)	$$\eta $$ (coefficient of viscocity)	(iv)	$$kg\,{m^{ - 1}}{s^{ - 2}}$$

Choose the most appropriate answer from the options given below :

If force (F), length (L) and time (T) are taken as the fundamental quantities. Then what will be the dimension of density :

A coaxial cable consists of an inner wire of radius 'a' surrounded by an outer shell of inner and outer radii 'b' and 'c' respectively. The inner wire carries an electric current i₀, which is distributed uniformly across cross-sectional area. The outer shell carries an equal current in opposite direction and distributed uniformly. What will be the ratio of the magnetic field at a distance x from the axis when (i) x < a and (ii) a < x < b ?