(a) (i) (1) What is meant by current sensitivity of a galvanometer? Mention the factors on which it depends. (2) A galvanometer of resistance G is converted into a voltmeter of range (0 - V) by using a resistance R. Find the resistance, in terms of R and G, required to convert it into a voltmeter of range (0 - V/2). (ii) The magnetic flux through a coil of resistance 5 $\Omega$ increases with time as : $\phi = (2.0 t^3 + 5.0 t^2 + 6.0 t) \text{ mWb}$ Find the magnitude of induced current through the coil at t = 2 s.