When an ammeter is used to measure the current in the circuit shown in (Figure 1), it reads 10 A. Figure 16 Q2 www 80 N m 10i 13.50Ω €144 Ω 1 of 1 Part A What is the resistance of the ammeter if v = 45 V? Express your answer to three significant figures and include the appropriate units. ► View Available Hint(s) Rmeter = Submit Part B % error = Submit O Provide Feedback μÅ Value What is the percentage of error in the current measurement? Express your answer as a percentage to three significant figures. ► View Available Hint(s) Units IVE ΑΣΦ ? ↓↑ vec www ? %

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Synchronous Motor

The synchronous motor is an AC electric type motor where at a steady-state the shaft rotation is synchronized with the supply current variable-frequency. To an integral number of AC cycles, the rotation period is exactly equal. The stator of the motor in the synchronous motor contains multi-phase AC electromagnets due to which a magnetic field is created that rotates in time with the oscillation of the line current. The rotor contains a permanent magnet and the rotor rotates in synchronization with the stator field at the same rate and provides the second synchronized magnetic field which is rotating in nature as a result. When the synchronous motor is supplied with independently excited multi-phase AC electromagnets on both the rotor and the stator, it is termed as a doubly-fed machine. The most widely used AC-type motors are the synchronous AC motor and the induction AC motors.