Identify various losses that occur in the shunt d.c. machine. A d.c. machine is connected across a 240 V line. It rotates at 1200 rpm and is generating 230 volts. The armature current is 40 amperes. (a) Is the machine functioning as a generator or as a motor? (b) Find the resistance of the armature circuit. (c) Determine the electromagnetic torque. (d) If the load is thrown off, what will be the generated voltage and the speed of the machine, assuming that there is negligible effect of armature reaction?
The lithology is labelled in yellow text. The bed boundaries are also marked as yellow dashed lines. A sedimentary log of the outcrop is provided on the right hand side. Write a short interpretation of the depositional processes that resulted in deposition of the beds in Figure 3. Take into account the type of flow, flow velocity etc. Younging direction is upwards. Medetone Sandstone Ripple cross-lamination Planar lamination Conglomerate -matrix-supported -matrix: muddy sandstone -clasts: sandstone & mudstone Load cast Flame structures Structureless Structurales sandstone medium- Rajah 3 / Figure 3
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