The internal resistance of each of the cells E\(^1\) and E\(^2\), shown in the figure above, is 2 Ohms. Calculate the total current in the circuit
Attached Figure / Diagram
A
0.80A
B
0.50A
C
0.40A
D
0.004A
Verified Correct Answer: C.
Physical Principles & Numerical Solution
The total internal resistance is \( r = 1 \, \Omega \) and the total resistance in the circuit is given by:
\(R = 4 + 1 = 5 \, \Omega\)
Using Ohm's law, we have:
\(V = I(R + r)\)
Substituting the values:
\(2 = I \cdot 5\)
Solving for \( I \):
\(I = \frac{2}{5} = 0.4 \, \text{A}\)
Source: Myschool Past Questions Archive (Record #41698)