Any help would be appreciated! Thanks! Three resistors and two batteries are con

Question

Any help would be appreciated! Thanks!

Three resistors and two batteries are connected as shown in the figure below. The magnitude and the direction of the currents in the unknown resistor R at the right and the 6.00 Ohm resistor on the left are as shown in the figure. The current in the 4.0 Ohm resistance flows from B to C. The emf of the battery on the left is unknown and is labeled as . For parts (a) through (d) fill in the blanks, for part (c) circle the correct choice. (Each answer is worth 5 points, no partial credit. You can use any portion of this page or the back side of any page but these will not be graded.) The current flow in the 4.0 Ohm resistor is ____________ Amperes. The unknown resistance R is ____________ Ohms. The unknown emf is ____________ Volts. The absolute value of the voltage difference between A and B is ____________ Volts. The voltage at point A on the figure is (i) higher (ii) lower than the voltage at point B.

Explanation / Answer

KVL:algebraic sum around a loop is zero==>KCL:algebraic sum of all currents leaving

or all currents entering any node is zero==>

a) IR4=(10+1)A=11A

b) 125-11A*4=81V==>R=81V/10A=8.1

c) 81V-6*1A=75V

d) Vac-Vbc=Vab=75/81-125/81=-50/81V

e) ii(lower)

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