A) 2.4 V
B) 1.2 V
C) 2.0 V
D) 3 V
E) 6 V
Correct Answer: B
Solution :
Total resistance or \[R=20+40\] \[R=60\Omega .\] Given: \[V=15\]volt current \[I=\frac{V}{R}=\frac{15}{60}\] \[I=0.25\text{ }A\] Potential gradient \[=\frac{V}{l}\] \[\frac{20\times 0.25}{10}\] \[=0.5V{{m}^{-1}}\] Potential difference across 240 cm \[E=0.5\times 2.4\] \[E=1.2\,V\]You need to login to perform this action.
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