Question

Question-
If all the resistors show in the circuit diagram have the same resistance which equals 4 ohm and all the batteries have the same electromotive force of 10V then find the value to I1 - I2.


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Answer 1

The simplified circuit is shown in Fig. S5.31. We have to find I.

Let

the potential of point P be zero. Potential at other points is

shown in Fig. S5.31. Applying Kirchhoff's current law at X

x

,we get

4

x−10

+

2

x−10

+

4

x−20

+

2

(x−10)

=0 or x=

3

35

V

I=

4

20−

3

35

=

12

25

A

Answer 2

$\huge \underline{answer}$

Answer is A. The given circuit diagram is redrawn to represent 3 resistors to be connected in parallel and the remaining 1 resistor to be connected in series with the parallel connection and the battery at the end. Components connected in parallel are connected so the same voltage is applied to each component. In a parallel circuit, the voltage across each of the components is the same, and the total current is the sum of the currents through each component.