5. A motor has coils with a resistance of 30.0 and operates from a voltage of...

Question

Question

5. A motor has coils with a resistance of 30.0 and operates from a voltage of 240 V. When the motor is operating at its maxim

science physics

Answer 1

Answer #1

Eeback The met woltage acemose the circuito of the motor is - Enet És applied voltage The current frowing of hroough the circ

Answer 2

Similar Homework Help Questions

A motor has calls with a resistance of 25 ohm and operates from a voltage of...

A motor has calls with a resistance of 25 ohm and operates from a voltage of 238 V. When the motor is operating at its maximum speed, the back emf is 149 V. Find the current in the calls when the motor is first turned on. A Find the current in the calls when the motor has reached maximum speed. A If the current in the motor were 7.0 A at some instant, what the back emf at that time?...
A 120-V, series-wound motor has a field resistance of 4.0  and an armature resistance of...

A 120-V, series-wound motor has a field resistance of 4.0  and an armature resistance of 2.5  . (a) Determine the current drawn by the motor at the very instant it is switched on, i.e., when it has not started to rotate. (b) When it is operating at nominal speed, a back emf of 85.0 V is generated. How much current is drawn in this case? (c) What is the furnished mechanical power? (d) How much power is dissipated?...
a) A motor has an armature resistance of 5.17 Ohm. If the motor draws 7.04 A...

a) A motor has an armature resistance of 5.17 Ohm. If the motor draws 7.04 A when running at full speed and connected to a 120 V supply line, how large is the back EMF? b) What would the current in the motor be if the load causes it to run at half speed? Assume that the supply voltage is fixed.

P4-17) A 240 V separately exited dc motor has an armature resistance of Ra = 006...

P4-17) A 240 V separately exited dc motor has an armature resistance of Ra = 006 Ω, when it is connected to a 240 V supply, it draws 90 A from the supply and rotates at 1200 rpm. Find the torque developed by the motor at this operating condition. If the torque developed is 280 Nm for the same excitation and same supply voltage, then find the speed and armature current. a) b)
In a shunt-wound dc motor with the field coils and rotor connected in parallel (see the...

In a shunt-wound dc motor with the field coils and rotor connected in parallel (see the figure (Figure 1)), the resistance Rf of the field coils is Rf = 103 Ω and the resistance Rr of the rotor is Rr = 5.5 Ω. When a potential difference of V = 120 V is applied to the brushes and the motor is running at full speed delivering mechanical power, the current supplied to it is 4.90 A. Part A.) What is...
a dc motor with its rotor and filed coils connected in serieshas an internal resistance of...

a dc motor with its rotor and filed coils connected in serieshas an internal resistance of 3.2Ω. when running at full load on a 120-v lined,the emf inthe rotor is 105V. a)what is the current drawn by the motor from the line? b)what is the power delivered to the motor? c) what is the mechanical power developed by this motor? these are the questions....

A motor operating on 230 V electricity has a 188 V back emf at operating speed...

A motor operating on 230 V electricity has a 188 V back emf at operating speed and draws a 12.8 A current. (a) What is its resistance (in ?)? 4 (b) What current (in A) does it draw when it is first started?
A shunt-wound DC motor with the field coils and rotor connected in parallel (see the figure)...

A shunt-wound DC motor with the field coils and rotor connected in parallel (see the figure) (Figure 1) operates from a 130 V DC power line. The resistance of the field windings, Rf, is 234 ? . The resistance of the rotor, Rr, is 4.10 ? . When the motor is running, the rotor develops an emf E. The motor draws a current of 4.82 A from the line. Friction losses amount to 47.0 W .
A shunt-wound DC motor with the field coils and rotor connected in parallel (Figure 1) operates...

A shunt-wound DC motor with the field coils and rotor connected in parallel (Figure 1) operates from a 135 VDC power line. The resistance of the field windings, Rf, is 247 Ω . The resistance of the rotor, Rr, is 5.90 Ω . When the motor is running, the rotor develops an emf E. The motor draws a current of 4.44 A from the line. Friction losses amount to 49.0 W . Compute the emf E. Compute the rate of...

3) The armature of a permanent-magnet dc motor has a resistance of 0.72 and draws a...

3) The armature of a permanent-magnet dc motor has a resistance of 0.72 and draws a current of 50 A when the speed is 1500 r/min when the armature is connected to a source of 48 V, calculate the following: a) The induced emf, EA, and the torque, T, produced at this speed. b) The motor speed, n (in rpm), when the torque is 2 Nm. c) The armature current at 1600 r/min. d) The torque at 1600 r/min. e)...