CASE-I: In a standard potentiometer to determine internal resistance of a cell of emf 2V, balancing lengths obtained with and without a shunt resistance of $10\Omega$  across the cell are 62.5cm and 75.2cm. 
CASE-II: In a standard meter bridge (initially at $0°C$ ) the right gap is provided with
a semiconductor of $300\Omega$  whose temperature coefficient of resistance is $0.6\Omega /K$  (This is rate of variation of resistance with temperature $\frac{dR}{dT}$  and is uniform) and in the left gap, a metallic resistor of $200\Omega$  of temperature coefficient of resistance $1.5\Omega /K$  (Both coefficient values are magnitudes only). The meter wire is not influenced by temperature. If at t= 0, the temperature of the arrangement starts increasing at a constant rate of  $0.01°C/s$, then

 

Column-I		Column-II
a)	in case-I: the internal resistance of cell in “ohms” is (approximately)	P)	2.3
b)	in case-I: current through shunt (in A) is (in null point status)	Q)	0.17
c)	in case-II: the initial speed with which the jockey is to be shifted to keep the galvanometer with zero reading is (in $mm.s^{-1}$ )	R)	20.8
d)	in case-II: the time (in s) at which the jockey reaches themidpoint of the wire to keep the galvanometer with zero reading all the time is	S)	2
		T)	4.35