Current Electricity - Result Question 33

35. In the circuit shown in Fig, the current in 4Ω resistance is 1.2A. What is the potential difference between B and C.

[1994]

(a) 3.6 volt

(b) 6.3 volt

(c) 1.8 volt

(d) 2.4 volt

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Answer:

Correct Answer: 35. (a)

Solution:

  1. (a) The potential difference across 4Ω resistance is given by

V=4×i1=4×1.2=4.8volt

So, the potential across 8Ω resistance is also 4.8 volt.

Current i2=V8=4.88=0.6amp

Current in 2Ω resistance i=i1+i2

i=1.2+0.6=1.8amp

Potential difference across 2Ω resistance VBC=1.8×2=3.6 volts



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