Question

Find the value of the voltage source ( V) that delivers 2 Amps current through the circuit as shown in fig.

Answer 1

Answer

Solution

Correct option is

B

explation

3.2 volt

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,

R  

eq

​

=1+  

0.5+0.5

0.5×0.5

​

=1.25Ω

Let current I flow in lower branch,

So, 1.25I=4V

I=  

1.25

4

​

=3.2A

therefore,

3.2A currents flows in 1Ω resistance,  

hence potential difference between M and N is  

V  

′

=3.2×1=3.2volt  

Hence,

option (B) is correct answe