Ammeter

Wattmeter

Energy meter

Tangent galvanometer

deflecting instrument

indicating instrument

recording instrument

integrating instrument

high temperature co-efficient of expansion

low specific resistance

low resistance to fatigue

good magnetic property

if it is used in horizontal position only

if it is used in vertical position only

if it is used in an inclined position only

if it is used in an inclined and horizontal position

Wrought iron

Silicon steel

Y-alloy

Alnico