Question #87057
A lamp is designed to operate on 6V and draw a current of 40 mA. It is connected to 9V. What size resistor must be connected to in series. Hint: find the resistance of the lamp when it is drawing 40 mA.
1
Expert's answer
2019-03-29T11:17:04-0400
R=9V−6V40mA=75OhmR=\frac{9V - 6V}{40mA} = 75 Ohm


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