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Question
The internal resistance of a cell of emf 2 V is 0.1 Ω it is connected to a resistance of 0.9 Ω. The voltage across the cell will be ______.
Options
0.5 V
1.8 V
1.95 V
3 V
MCQ
Fill in the Blanks
Solution
The internal resistance of a cell of emf 2 V is 0.1 Ω it is connected to a resistance of 0.9 Ω. The voltage across the cell will be 1.8 V.
Explanation:
E = I (r + R)
∴ I = `"E"/("r"+"R")`
= `2/(0.1+0.9)`
I = 2 A
∴ V = IR
= 2 × 0.9
= 1.8 V
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Electromotive Force (emf)
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Chapter 11: Electric Current Through Conductors - Exercises [Page 219]
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