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A simple 2-pole dc machine consists of a rotating loop inside a magnetic field B=2T. The radius and length of the loop are 0.2 meter and 0.4 meter, respectively. The loop is connected in series to a battery VB = 120 V and a resistor R = 0.5 N via slip rings and carbon brushes (commutator). The current of i is flowing from the battery to the loop. The power loss in the resistor R is 320 W. Find the value of i, the induced voltage in the loop, induced torque and its direction (following or opposing the direction of rotation), the speed of the loop in rad/s, the shaft's power, and the battery power. What is this machine? Verify your answer according to its definition. In addition, find the efficiency of this machine.

A simple 2-pole dc machine consists of a rotating loop inside a magnetic field B=2T. The radius and length of the loop are 0.2 meter and 0.4 meter, respectively. The loop is connected in series to a battery VB = 120 V and a resistor R = 0.5 N via slip rings and carbon brushes (commutator). The current of i is flowing from the battery to the loop. The power loss in the resistor R is 320 W. Find the value of i, the induced voltage in the loop, induced torque and its direction (following or opposing the direction of rotation), the speed of the loop in rad/s, the shaft's power, and the battery power. What is this machine? Verify your answer according to its definition. In addition, find the efficiency of this machine.

Delmar's Standard Textbook Of Electricity
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter29: Dc Generators
Section: Chapter Questions
Problem 1PA: You are working as an electrician in a large steel manufacturing plant, and you are in the process...
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A simple 2-pole dc machine consists of a rotating loop inside a magnetic field B = 2 T. The radius and length of the loop are 0.2 meter and 0.4 meter, respectively. The loop is connected in series to a battery VB = 120 V and a resistor R = 0.5 N via slip rings and carbon brushes (commutator). The current of i is flowing from the battery to the loop. The power loss in the resistor R is 320 W. Find the value of i, the induced voltage in the loop, induced torque and its direction (following or opposing the direction of rotation), the speed of the loop in rad/s, the shaft's power, and the battery power. What is this machine? Verify your answer according to its definition. In addition, find the efficiency of this machine.
Transcribed Image Text:A simple 2-pole dc machine consists of a rotating loop inside a magnetic field B = 2 T. The radius and length of the loop are 0.2 meter and 0.4 meter, respectively. The loop is connected in series to a battery VB = 120 V and a resistor R = 0.5 N via slip rings and carbon brushes (commutator). The current of i is flowing from the battery to the loop. The power loss in the resistor R is 320 W. Find the value of i, the induced voltage in the loop, induced torque and its direction (following or opposing the direction of rotation), the speed of the loop in rad/s, the shaft's power, and the battery power. What is this machine? Verify your answer according to its definition. In addition, find the efficiency of this machine.
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