Deflecting torque is directly proportional to current, then the scale of the ammeter is linear and the meter is PMMC type. Given data I1=5A,θ1=80° For I1 current let the deflection be θ1 I2=2.5A,θ2=? For I2 current let the deflection be θ2 The current passing through the ammeter is directly proportional to the deflection of the pointer I∝θ ⇒