A constant voltage is applied between the two ends of a uniform metallic wire. Same heat is developed in it. The heat developed is doubled if

Heat developed H =V2R×tHeat developed will be doubled when .R is halvedFurther. 'R= =ρlA=ρlπr2∴ H=V2×πr2ρl×tSo heat produced will be doubled when both the length and radius of the wire are doubled