Physics, 28.10.2019 23:31 mjohn6150

The current throught a particular high-resistance(long) bulb when connected to two batteries in series (3.2 volts)is about 90 milliampere (ma); connected to one battery (1.6 volts)the current is about 80 ma; and connected to a small voltage ofonly 50 millivolts the current is about 5 ma. (differenthigh-resistance (long) bulbs may differ from these valuessomewhat.) using the formula i = , what is r for each of these cases?
1.
2.
3.
(b) is a high-resistance (long) bulb an ohmic resistorover this whole range of currents? (choose the correctanswer(s))
1. the bulb is not ohmic, because itsresistance changes if the current through the bulb changes.
2. the bulb is ohmic, because it isnot possible for the resistance of any resistor to change.
3. the bulb is ohmic, because lightbulbs are ohmic.
4. the bulb is ohmic, because one canuse the formula .

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