In a motor, increasing the gap between electromagnets and a rotor: Select one: decreases motor torque. increases motor torque. increases motor speed. reverses the direction the rotor turns.
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In a motor, increasing the gap between electromagnets and a rotor:
Select one:
- decreases motor torque.
- increases motor torque.
- increases motor speed.
- reverses the direction the rotor turns.
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- 2. Give two ways you can reverse the direction of a basic dc motor? O a) Reverse the current O b) Keep the current the same O c) Reverse the magnetic field O d) Keep the magnetic field the sameA dc motor takes an armature current of 105 Amps at 480 V when running at 720 rpm. The resistance of the armature circuit is 0.2 ohm and the field resistance is 96 ohms. What is the torque developed in the armature?Do you What is Induction motor?
- Q- The armature resistance of a permanent magnet dc motor is 0.80. At no load, the motor draws 1.5 A from a supply voltage of 25 V and runs at 1500 rpm. The efficiency of the motor while it is operating on load at 1500 rpm drawing a current of 3.5 A from the same source will beThe actual rotor resistance referred to the stator in an induction motor is? O a. r2 O b. r2/(1-s) O c. r2/s O d. r2*(1-s)/sThe counter e.m.f. of a d.c. motor often exceeds the supply voltage aids the applied voltage helps in energy conversion regulates its armature voltage In a d.c. motor, the mechanical output power actually comes from field system air-gap flux back e.m.f. electrical input power
- Why do motors have gaps or breaks throughout the rotor and commutator? It makes the motor cheaper since not as much material is needed. Only some sections of the rotor will act as electromagnets, causing the rotor to always be pushed in the same direction. It allows some of the magnetic field to escape so that rotor doesn't get too stressed. It lets air into the motor to keep it cool since the electricity can make it hot. It happens when rotors don't use enough oil, so they crack.At no load, a 250V shunt motor runs at 1000 rpm and draws 8A. Armature and field resistances are 0.20 ohm and 250 ohms, respectively. If the motor draws a current of 50A, its speed will beA 220 V series motor takes 15 A and runs at 700 rpm. The armature resistance including the resistance of the series winding is 0.8 ohm. At what speed will it run if a 2-ohm resistance is connected in series with supply voltage? Assume the motor is taking the same current.
- divided by rpm. Torque equals horsepower 5252 a. b. horsepower x 5252 voltage x horsepower C. d.Please do not copy other answers is Wrong other wise I give Downvote. A 200 V dc series motor runs at 700 rpm when operating at its full load current of 20 A. The motor resistance is 0.52 and the be used if magnetic circuit can be assumed unsaturated. What will be speed if the load torque is increased by 44%.Question 4 To minimize the time where the voltage produced by a coil in the armature of a dc generator is zero, we minimize the A air gap B pole gap Question 5 A 6-pole dc generator with a simplex wave winding has parallel paths in its armature winding. Round your answer to 0 decimal places. Add your answer