Question: A flashlight bulb rated at 2.5 W and 3.0V is operated by 1 9.0-V battery. To light the bulb at its rated voltage and power,

A flashlight bulb rated at 2.5 W and 3.0V is operated by 1 9.0-V battery. To light the bulb at its rated voltage and power, a resistor R is connected in series as shown in Fig. 19-72. What value should the resistor have?

9.0 V

9.0 V

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