What would be the effect on the resistance of a metal wire of :
(a) increasing its length?
(b) increasing its diameter?
(c) increasing its temperature?
(a) The resistance of a metal wire will increase as it is directly proportional to length.
(b) The resistance of a metal wire decrease as it is inversely proportional to the area of the wire.
(c) Resistance of a conductor depends upon the nature of the material of the conductor. Resistance of a conductor increases on raising the temperature and decreases on lowering the temperature