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A bathroom exhaust fan is not designed to operate at the voltage of standard household wiring (Vrms = 120 V). In order to operate at lower voltage, fan units incorporate a step-down transformer with Np 100 turns on the primary side and Ng 20 turns on the secondary side. The transformer can be treated as ideal, but the windings of the fan's motor contain. a resistance of R = 8.0. At normal operating speed, the motor produces a back emf of E= 4.5V. How much current irms flows through the motor at normal operating speed?

A bathroom exhaust fan is not designed to operate at the voltage of standard household wiring (Vrms = 120 V). In order to operate at lower voltage, fan units incorporate a step-down transformer with Np 100 turns on the primary side and Ng 20 turns on the secondary side. The transformer can be treated as ideal, but the windings of the fan's motor contain. a resistance of R = 8.0. At normal operating speed, the motor produces a back emf of E= 4.5V. How much current irms flows through the motor at normal operating speed?

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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A bathroom exhaust fan is not designed to operate at the voltage of standard household wiring (Vrms = 120 V). In order to operate at lower voltage, fan units incorporate a step-down transformer with Np 100 turns on the primary side and Ng 20 turns on the secondary side. The transformer can be treated as ideal, but the windings of the fan's motor contain a resistance of R = 8.00. At normal operating speed, the. motor produces a back emf of E= 4.5 V. How much current irms flows through the motor at normal operating speed? Representation Physics Concept (s) (Refer to the list of concepts on Carmen under modules/course documents.) (1) (2) Initial Equation(s) Ns Vs Np Vp Show your equation work on next page Symbolic Answer: Algebra Work (Symbols only. Don't plug in any numbers yet.) Units Check =
Transcribed Image Text:A bathroom exhaust fan is not designed to operate at the voltage of standard household wiring (Vrms = 120 V). In order to operate at lower voltage, fan units incorporate a step-down transformer with Np 100 turns on the primary side and Ng 20 turns on the secondary side. The transformer can be treated as ideal, but the windings of the fan's motor contain a resistance of R = 8.00. At normal operating speed, the. motor produces a back emf of E= 4.5 V. How much current irms flows through the motor at normal operating speed? Representation Physics Concept (s) (Refer to the list of concepts on Carmen under modules/course documents.) (1) (2) Initial Equation(s) Ns Vs Np Vp Show your equation work on next page Symbolic Answer: Algebra Work (Symbols only. Don't plug in any numbers yet.) Units Check =
Expert Solution
Step 1

Given that,

Normal household supply= 120V (rms)

Primary turn (N1 )=100

Secondary turn (N2 )=20

R=8Ω

E (back EMF)=4.5 V.

We have to determine the secondary rms current value.

 

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