Electrical 2 - chapter 4

Electrical 2 - chapter 4

University

39 Qs

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Electrical 2 - chapter 4

Electrical 2 - chapter 4

Assessment

Quiz

Physics

University

Practice Problem

Hard

Created by

LAVANYA R

Used 1+ times

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39 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1. The sole purpose of a commutator in a dc generator is to

a. increase output voltage
reduce sparking at brushes
provide smoother output
convert the induced ac into dc

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

2. The series field of a short shunt dc generator is excited by ________ currents

shunt
armature
load
external

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

3. In a d.c. generator, the generated emf is directly proportional to the

number of dummy coils
number of poles
number of armature parallel paths
all of the above

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

4. The commercial efficiency of a shunt generator is maximum when its variable loss equals ______ loss

constant
iron
friction and windage
none of the above

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

. The external characteristic of a dc generator is the curve between

V and IL
E and Ia
E0 and Vf
V and If

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

6. The internal characteristic of a dc generator is the curve between

V and Ia
E and Ia
E0 and Vf
V and If

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

7. The open circuit characteristics of a dc generator is the curve between

V and Ia
E and Ia
E0 and If
V and If

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