6. The motion in DC motor can be increased by the following factors... (yc may choose more than one) * a) Using a stronger magnet b) Increasing the potential difference c) Increasing the current d) Increasing the number of turns on the coil

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1. A fundamental DC motor is shown below. VTerminal = 90V. The running current, I = 5A and the rotor resistance, R = 4 ohms. Answer the following: CEMF or E at the running condition = , Power delivered by the source at the running condition = Power converted to mechanical power at the running condition Power lost in heat by the rotor resistance = Show your work for each calculation. Suggest that you clearly mark the schematic. frut

Question You have a wire of length L = 2.3 m for making a square coil of a dc motor. The current in the coil is I 1.8 A, and the magnetic field of the motor has a magnitude of B = 0.32 T. Find the maximum torque exerted on the coil when the wire is used to make (a) a single-turn square coil and (b) a two- turn square coil.