Question
Physics Question on Electromagnetic Field (EMF)
A potentiometer with a cell of 2.4 volts and internal resistance of 2 Ω maintains potential drop across the resistance wire AB of length 2 m and resistance 10 Ω. A standard cell that maintains a constant EMF of 'V' volt with an internal resistance of 0.2 gives a balance point at 1.6 M length of the wire. The value of EMF of the second (standard) cell(V) is:
A
2.0 volt
B
1.9 volt
C
1.8 volt
D
1.6 volt
Answer
1.6 volt
Explanation
Solution
The correct answer is (D):1.6 volt