In which of the following appUcations, direct current is absolutely essential ?
A). Illumination
B). Electrolysis
C). Variable speed operation
D). Traction
1. The input offset current equals the ___________
2. In phase response of a recorder noise level ___________ with the band width of a system
4. A practical current source has a finite internal resistance.
6. The electric field at a point situated at a distance d from straight charged conductor is
7. In Rankine cycle the work output from the turbine is given by