For the following questions assume all batteries have the same voltage, all bulb

Question

For the following questions assume all batteries have the same voltage, all bulbs have the same resistance, and the wires are ideal. a. How does the magnitude of the voltage across the battery (V_ab) compare to the magnitude of the voltage across the lightbulb (V_cd)? b. In lab, we saw that the amount of current coming out of a lightbulb (point d) is the same as the amount of current coming in (point c). If the bulb isn't "using up" the current (i.e. electric charges) what causes the bulb to light up?

Explanation / Answer

As shown in question image that a single bulb connected with a battery in series then-

Vab = Vcd (Because this is only component connect wtih battery terminal so total voltage of battery will be equal to the voltage across the component)

Part b)-

Yes you right that current incoming to the bulb = current outging the bulb Because bulb consider as a resistive load and in resistance we flow the rule (current incoming to the resistance = current outging the resistance )

NOw question raise that then what is the reason behind the glowing up the bulb -

It is nothing but heat loss of resistance produced by the bulb.

This heat loss energy is showing us as a glow of bulb nothing else.

Thank you !!! Have fun

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