You might have a flashlight that runs (2) d-cells of 1.5 volts each in series. the bulb is rated for 0.7 amps. what's its resistance?

Question

Chemistry

Frank Key

13 February, 02:11

You might have a flashlight that runs (2) d-cells of 1.5 volts each in series. the bulb is rated for 0.7 amps. what's its resistance?

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Answers (1)

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Deja Choi · Answer 1

From Ohm's law, we get the general equation that would relate the voltage, current, and resistance,

V = I x R

where V is voltage, R is resistance, and I is current. Deriving the equation for R

R = V / I

R = (1.5 volts) / (0.7 amps) = 2.14 Ohms