The component that forms the electrical connection between the rotating coil of wire in a motor and the external source of electrical energy is called the:

A. Equals the number of holes B. Is less than the number of holes C. Is greater than the number of holes D. Impossible to say E. None of the above

A. solar cell B. thermocouple C. chemical cell D. generator E. None of the above

A. A diamagnetic material B. A paramagnetic material C. A feiTomagnetic material D. All of the above E. None of the above

A. always increases as the applied frequency increases B. is equal to the sum of the values of resistance, inductive reactance and capacitive reactance C. always decreases as the applied frequency increases D. is maximum at the resonant frequency E. None of the above