Q. 27 A5.0( 1 Vote )

In the given circ

Answer :

(i) The ammeter reading will decrease. This is because Resistance is directly proportional to the length; hence with the increase in the length the resistance of the wire will increase. So the current will decrease due to increase in the resistance (current is inversely proportional to the resistance).

(ii) The ammeter reading will increase because.


Thus the resistance is inversely proportional to the area of the cross section, so with the increase in the area the resistance of the wire will decrease.


Therefore with the decrease in the resistance the current will increase (current is inversely proportional to the resistance).hence the ammeter reading will increase


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