A) \[0.5\,\,\Omega \]
B) \[1\,\,\Omega \]
C) \[1.2\,\,\Omega \]
D) \[2\,\,\Omega \]
Correct Answer: A
Solution :
Here, we have been given similar information?s twice, to obtain two simultaneous linear equations. Substituting\[E-Ir=V\], the following two equations can be obtained \[E=0\cdot 9r=1\cdot 8\] \[E-0\cdot 3r=2\cdot 1\] Since, \[r\] is to be calculated, \[E\] is eliminated below: \[1\cdot 8+0\cdot 9r=2\cdot 1+0\cdot 3r\] or \[r=\frac{0\cdot 3}{0\cdot 6}=0\cdot 5\]
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