If two resistorsR1 and(R2>R1) are connected in parallel as shown in Fig. Q, which of the following must be true? In each case justify your answer.

(a) I1=I2.

(b) I3=I4.

(c) The current is greater inR1 than in R2.

(d) The rate of electrical energy consumption is the same for both resistors.

(e) The rate of electrical energy consumption is greaterrole="math" localid="1663843965569" R2 in than in R1.

(f)Vcd=Vef=Vab

(g) Point c is at higher potential than point d.

(h) Pointf is at higher potential than at point e.

(i) Pointc is at higher potential than at point e.

Short Answer

Expert verified

(a) False

(b) True

(c) True

(d) False

(e) False

(f) True

(f) True

(g False

(h) False

Step by step solution

01

Definition of parallel connection

In a parallel circuit, all components are connected in such a way that the potential drop across all the components is the same.

02

Determining if the statements are true or false

(a) False.

R1andR2 are in parallel where the current is not the same in both resistors. And as R2>R1, henceI1>I2 where Iα1R.

(b) True.

The combination of R1and R2are in series with the remaining circuit where the current in series is the same. The current enters equal to the current out. (conservation of charges theorem)

(c) True.

As discussed in part (a).

(d) False.

The consumed power P is inversely proportional to the resistance when the voltage is the same P=V2R. And as R2>R1, hence P1>P2.

(e) False.

As discussed in part (d), P1>P2.

(f) True.

In parallel, the voltage across is the same for each individual resistanceR1 and R2.

(g) True.

The current flows from higher potential energy to lower potential energy, therefore, the potential at c is higher than d.

(h) False.

As discussed in part (g), the current flows from higher potential energy to lower potential energy, therefore,e has a higher potential than f.

(i) False. Both points have the same voltage as both resistorsR1 andR2 are in parallel.

Thus, the statements are False, True, True, False, False, True, True, False, and False respectively.

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