Class 12 NEET Physics Current Electricity Questions Part 1

As 4Ω and 3Ω are in parallel, the potential difference is same across them.If I1 is the current through 3Ω resistance, then 4×1=3×I1
or I1=

4

3

A
Total resistance of 4Ω and 3Ω =

4×3

4+3

=

12

7

Ω
Total current in the upper portion of the circuit from P to M
=I=1+

4

3

=

7

3

A
Potential difference between P and M =

7

3

×

12

7

=4V
Current in the arm PNM is
I′=

4 0.5×0.5

0.5+0.5

+1=

16

5

A
Potential difference across N and M =I′×1=

16

5

×1=3.2V