UPSEE 2019 Solved Paper

Electric circuit diagram of ammeter, galvanometer and voltmeter is shown below,
(i) Ammeter⇒Req(A)=

RsRG

RG+Rs

(ii) Galvanometer ⇒Req(G)=RG
(iii) Voltmeter⇒Req(V)=RG+RV
Hence, the order of resistances
Req(V)>Rreq(G)>Req(A)
So, the maximum resistance device is voltmeter.