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Two batteries of different emfs and diff...

Two batteries of different emfs and different internal resistances are connected as shown. The voltage across AB in volts is.
.

A

3V

B

4V

C

5V

D

6V

Text Solution

Verified by Experts

The correct Answer is:
C
`because 6 V gt 3 V`
The current (I) in the circuit will flow as shown.

Applying Kirchhoff's loop law, to the loop CDEFC, we get
`-3-2xxI-1+6=0`
`therefore 3=3I therefore I=1 A`
For the path ACDB, `V_(A)-3-2xx1-V_(B)=0`
`therefore V_(A)-V_(B)=3+2=5V`
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