Current Electricity and Electrical InstrumentHard
Question
The cell has an emf of 2V and the internal resistance of this cell is 0.1Ω, It is connected to a resistance of 3.9Ω. The voltage across the cell will be:
Options
A.1.95V
B.1.5V
C.2V
D.1.8V
Solution
Current = 
= 0.5
Voltage across the cell
= 2 - 0.5 × 0.1 = 2 - 0.05 = 1.95V
= 0.5Voltage across the cell
= 2 - 0.5 × 0.1 = 2 - 0.05 = 1.95V
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