A cell has an emf of 1.5 V and an internal resistance of 0.65 Q.
2 answers:
Answer:
hI DUDE WHERE DID YOU GET THIS FROM?
Explanation:
I GOT IT FROM THE AQA WEBSITE BUT IS IT A PREVIOUSLY LOCKED PAPER THAT THEY RELEASED OR IS THIS QUESTION OLD , PLS TELL THIS MIGHT COME FOR MY AS EXAM
Answer:
Explanation:
1) emf stands for elactro-motive force and represents the ability to move electrical charge carriers. Commonly referred to as Volts.
2) P = VI = 1.5(0.31) = 0.465 ≈ <u>0.47 W</u>
3) P = 0.465 - I²R = 0.465 - 0.31²(0.65) = 0.402535 W = J/s ≈ <u>0.40 J</u>
4) 14000 J / 0.40 J/s = <u>35 000 s </u> or about 9.75 hrs
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