1.

In the circuit shown epsilon_(1) and epsilon_(2) are two ideal sources of unknown emf. Some currents are shown in some branches of the circuit. Potential difference appearing across resistance 6Omega is V_(A)-V_(B)=10V. Then

Answer»

The current in the CD branch is 5 AMP
The UNKNOWN emf `e_(1)` is 40 volts
The unknown emf `epsilon_(2)` is 68 volts
The unknown resistance `R` is `9Omega`

Solution :By APPLYING Kirchhof's law
`epsilon_(1)=40V`
`epsilon_(2)=68V`
`R=9Omega` and current through `4Omega=5` amp


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