a Explain the difference between the terms e m f and potential difference b This circuit contains batteries and resistors You may assume that the batteries have negligible internal resistance i Use Kirchhoffs first law to find the current in the 4 00 and 8 00 resistors ii Calculate the e m f of E 1 iii Calculate the value of E 2 iv Calculate the current in the 12 00 resistor E1 1 75 4 00 8 00 1 00 A E2 3 00 12 00 Figure 9 29

Question: a. Explain the difference between the terms e.m.f. and potential difference. b. This circuit contains batteries and resistors. You may assume that the batteries have

a. Explain the difference between the terms e.m.f. and potential difference.
b. This circuit contains batteries and resistors. You may assume that the batteries have negligible internal resistance.

E1 1.75 4.00 8.00 1.00 A E2 3.00 12.00 Figure 9.29

i. Use Kirchhoff’s first law to find the current in the 4.00 Ω and 8.00 Ω resistors.
ii. Calculate the e.m.f. of E₁.
iii. Calculate the value of E₂.
iv. Calculate the current in the 12.00 Ω resistor.

E1 1.75 4.00 8.00 1.00 A E2 3.00 12.00 Figure 9.29

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