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OpenStudy (anonymous):
A walkman uses a current of 2.0 A and has an internal resistance of 3.0 Ω, how many 1.5V batteries are required.
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OpenStudy (anonymous):
ahh what's the formula again?
OpenStudy (anonymous):
V = IR
OpenStudy (anonymous):
okay so whats V = IR from what you're given? Ignore the 1.5V for now
OpenStudy (anonymous):
Given I = 2, R = 3
OpenStudy (anonymous):
what V do you get from that?
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OpenStudy (anonymous):
i got 6V. I think its wrong
OpenStudy (anonymous):
no that's right, since 2 * 3 = 6 Okay so now you have 6V which is the amount of battery used by the walkman
OpenStudy (anonymous):
So how many 1.5V batteries you need to make it equal 6V?
OpenStudy (anonymous):
4 i think
OpenStudy (anonymous):
there you go :) 1.5 * 4 = 6
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