What is the difference between a standby battery and a deep cycle battery?

Find the potential difference across the battery.?

• 1.)A 8.7 resistor and a 5.3 resistor are connected in series with a battery. The potential difference across the 5.3 resistor is measured as 12 V. Find the potential difference across the battery. answer in V 2.)A 7.3 resistor and a 6.4 resistor are connected in parallel with a battery. The current across the 7.3 resistor is measured as 0.25 A. Find the potential difference across the battery. answer in V 3.)A 8.8 resistor and a 5.9 resistor are connected in series with a battery. The current across the 8.8 resistor is measured as 0.25 A. Find the potential difference across the battery. Answer in V Please Help Me Please I Need To Know How To Do This

• Answer:

  1) Here you have a potential divider, normally you would be finding the value across the resistor so the standard formula requires rearrangement Vr2 = Vtotal x R2 / (R1 + R2) ...becomes (skipped a couple of steps here)... Vtotal = Vr2 x (R1 + R2) / R2 Vtotal = 12 x (8.7 + 5.3) / 5.3 = 168 / 5.3 = 31.698V (confirmed in my electronics simulation software) 2) The 6.4 resistor here is to throw you off, ignore it. Since V = I x R, you just need to do V = 0.25 x 7.3 = 1.825 3) Here you need to calculate first the voltage across the 8.8 resistor using V = I x R, then use that with the method in number 1 to get the final answer. I'll let you do the working on that! Good luck!