List - I		List - II
a)	Tangent galvanometer	e)	Uniform calibration of scale
b)	Radial magnetic field	f)	High resistance
c)	Ammeter	g)	Reduction factor
d)	Voltmeter	h)	Low resistance

	a	b	c	d
1	h	g	f	e
2	g	e	h	f
3	h	e	f	g
4	h	g	e	f

Reduction factor of a tangent galvanometer is given as, 

$\mathrm{i}=\mathrm{K} \mathrm{tan\theta } , \mathrm{K}=\frac{\left(2{\mathrm{rB}}_{\mathrm{H}}\right)}{\left({\mathrm{\mu }}_0\mathrm{n}\right)}$

Radial magnetic field makes the deflection directly proportional to the current and facilitates easy calibration of the galvanometer scale.

For ammeter, low resistance is used as shunt.

For voltmeter, high resistance is used.