Three equal resistors (R) are connected to a battery as shown in (Figure 1) . Fi

ID: 1558193 • Letter: T

Question

Three equal resistors (R) are connected to a battery as shown in (Figure 1) .

Figure 1 of 1

Part A

Qualitatively, what happens to the voltage drop across each of these resistors when the switch S is opened, after having been closed for a long time?

A.Vleft increases; Vmiddle decreases; Vright goes to 0.

B.Vleft decreases; Vmiddle decreases; Vright goes to 0.

C.Vleft increases; Vmiddle increases; Vright goes to 0.

D.Vleft decreases; Vmiddle increases; Vright goes to 0.

Part B. Qualitatively, what happens to the current flow through each of these resistors when the switch S is opened, after having been closed for a long time?

A.Ileft increases; Imiddle increases; Iright goes to 0.

B.Ileft decreases; Imiddle decreases; Iright goes to 0.

C.Ileft decreases; Imiddle increases; Iright goes to 0.

D.Ileft increases; Imiddle decreases; Iright goes to 0.

Part C What happens to the terminal voltage of the battery, when the switch S is opened, after having been closed for a long time? A.The terminal voltage does not change.

B.The terminal voltage increases.

C.The terminal voltage decreases.

Part D If the emf of the battery is 9.0 V, what is its terminal voltage when the switch is closed if the internal resistance r is 0.50 and R=5.50? Express your answer to two significant figures and include the appropriate units.

V=?

R R R S

Explanation / Answer

Part A) When switch S is opened,there is no voltage drop across right R,and current in the left and middle R increse and thereby voltage drop is also increases

so the answer is C) Vleft inreases,Vmiddle increases,Vright goes to 0

Part B) when switch is opened

When switch S is opened,there is no current in right R,and current in the left and middle R increases

so the answer is A) Ileft increases,Imiddle increases,Iright goes to zero

Part C) Terminal volatge is Vt = e-(i*R)

When switch is opened, current through battery does not changes

hence the answer is A) the terminal volatge does not change

Part D) Rnet = R+2R = 3*R

current through battery is i = e/Rnet = 9/(3*5.5) = 0.545 A

Vt = e-(i*r) = 9-(0.545*0.5) = 8.73 V

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Three equal resistors (R) are connected to a battery as shown in (Figure 1) . Fi

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Three equal resistors (R) are connected to a battery as shown in (Figure 1) . Fi

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