Solved: An ordinary flashlight uses two D-cell 1.5-V
Chapter 16, Problem 35P(choose chapter or problem)
(II) An ordinary flashlight uses two D-cell 1.5-V batteries connected in series as in Fig. 18–4b (Fig. 18–36).The bulb draws 450 mA when turned on.
(a) Calculate the resistance of the bulb and the power dissipated.
(b) By what factor would the power increase if four D-cells in series were used with the same bulb? (Neglect heating effects of the filament.) Why shouldn’t you try this?
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