The heat produced in a wire of resistance 'x' when a current 'y' flows through it in time 'z' is given by:

(a) x² × y × z
(b) x × z × y²
(c) y × z² × x
(d) y × z × x

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Solution

(b) x $\times$ z $\times y^{2}$
This is so because heat, H = I²Rt

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