Question

Why cant we use galvanometer directly to measure current

Answer 1

Since galvanometer shows deflection only if current is passed through it but doesn't show the exact value of current. Ammeter is used to do so

Answer 2

galvanometer is used to measure the direction of the current and is not used to measure current , it deflects in that direction

ammeter is used to measure current , it should be placed in series and ammeter should be of very less resistance in order to measure current