1) Which of the following must be true of the currents in the circuit? i A = i B

Question

1) Which of the following must be true of the currents in the circuit?
iA = iB,
iA = iC,
iA = iB = iC  
iA = iB + iC  
iA = iB - iC  
None of these.



Explain your answer.

2) What is the relationship between iB and iC?
iB = iC
iB = ½ iC
iB = iC
iB = 2iC
iB = 3iC
None of these


Explain your answer.

3) Which of the following must be true about the potential drops in the circuit?
VA = VB
VB = VC
VA = VB
V0 = VB + VC
V0 = VA + VB
V0 = VA + VC



Explain your answer.

In the circuit shown at the right, RA: is identical to RB:, and their resistance is half of RC: RA: = RB: = ½ RC:. The current through resistor A is iA:, iB is the current through resistor B, and iC through resistor C. The potential drop across resistor A is VA and so on. The battery provides an EMF = V0. C C R 1 B B A lA > R .1 0

Explanation / Answer

Here,

RA = RB

RA = RB = RC/2

1) Using KCL

iA = iC + iB

the correct option is

iA = iB + iC

2) as RB = RC/2

iB = 2 * iC

3) for the potential drop

as RB and RC are in parallel

VB = VC

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