Question

the circuit through the 4 ohm resistor in the portion of circuit given is ​

Answer 1

Explanation:

Answer

In the given fig:−

In parallel resistances, the potential differences across them is same.

potential difference across PM  

V=4×1=4volt(i.e,across4Ω)

Equivalent resistance of lower side arm,

Req=1+0.5+0.50.5×0.5=1.25Ω

Let current I flow in lower branch,

So, 1.25I=4V

I=1.254=3.2A

therefore,

3.2A currents flows in 1Ω resistance, 

hence potential difference between Mand N is 

V′=3.2×1=3.2volt 

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