7. Explain radial distributor.

13.a. A bridge circuit is used to measure the loss of larger transformers because the circuitA. promotes safety.B. eliminates calculations.C. increases measuring convenience.D. improves measurement accuracy.13.b. A synchronous machine is run as an unloaded motor. If a low voltage is supplied at the ratedfrequency, and if the full-load armature current flows, a test is being run to determine theA. windage loss.B. I²R loss.C. stray-load loss.D. core loss.

The field current of a separately-excited dc motor operating with a fixed armature voltage and a fixed mechanical load is changed. This causes the speed to increase. The field current has been: Select one: O a. This is not possible because the speed is independent of the field current. O b. decreased. O. increased. O d. None of the above. A single phase transformer is rated at 10KVA, 220/108. If a load resistance 1.5 ohm is connected across 108 V winding, calculate the transformer efficiency (in percent) if the total losses in the transformer is 2746W? Answer: Synchronous generator will produce sufficient electrical power output if it is given: Select one: O a. Ac current. O b. Mechanical power input and dc field current. O. Mechanical power input only. O d. Mechanical power input and Ac filed current.