A series DC motor has a resistance of 5 Q between its terminals. The motor runs at 1,205 rpm at 230 V taking a current of 8 A. What will be the speed at which the motor runs when it is connected in series with a 5 2 resistance, if there is no change in the supply voltage and current. Give your answer to two decimal places.

A series DC motor has a resistance of 5 Q between its terminals. The motor runs at 1,205 rpm at 230 V taking a current of 8 A. What will be the speed at which the motor runs when it is connected in series with a 5 2 resistance, if there is no change in the supply voltage and current. Give your answer to two decimal places.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

See similar textbooks

Similar questions

Q3: A universal fractional horsepower series motor has a resistance of 30 22 and a total inductance of 0.5 H. When connected to a 250 V d.c. supply and loaded to take 0.8 A, it runs at 2000 r.p.m. Estimate the speed and p.f. when connected to a 250 V a.c. supply and loaded to the same current.
High voltage high torque d-c motor oW voltago lo w toraue noto
The torque developed by a dc series motor is 12 N-m when drawing 23 A. If the current is doubled, the torque developed becomes N-m.
A series DC motor has a resistance of 5 0 between its terminals. The motor runs at 1,210 rpm at. 230 V taking acurrent of 12 A. What will be the speed at which the motor runs when it is connected in series with a 4 2resistance, if there is no change in the supply voltage and current. Give your answer to two decimal places.
The meter constant of a single phase 230 V, induction energy meter is 800 rev/ kWh. What will be the speed of rotation of meter disc in rpm for a current of 20 A at 0.7 pf lagging?
The field winding of a d.c. motor is connected to a 110V supply. At a temperature of 18°C, the current drawn is 0.575 A. After running the machine for some time the current has fallen to 0.475 A, the voltage remaining unchanged. Calculate the temperature of the winding under the new conditions, assuming that the temperature coefficient of resistance of copper is 0.004 26/°C at 0°C.
An electron synchrotron of 6 x 109eV, electrons march through the machine in a roughly circular path 240 meters long. It is normal to have around 1011 electrons circulating in this path during an acceleration cycle. The speed of electrons is practically that of light. What is the current?
In DC machines, used to collect and supply current to the external load circuit.
The torque developed by a dc series motor is 16 N-m when drawing 23 A. If the current is doubled, the torque developed becomes N-m.
You have a 150 [kW] DC motor with an efficiency of 92% operating at full-load. The losses in the DC motor are:
A d.c series motor has a resistance of 1.5 W between its terminals.The motor runs at 700 r.p.m. at 230 V by taking a current of 20 A. Calculate the speed at which the motor will run when connected in series with a 4 N resistance and taking the same current at the same supply voltage?
When a 5 A current is made to flow through a coil of 20 turns produce a flux of 10 Wb. Find the voltage across the coil if the rate of change of current through the coil is 8 mA/s.