Lecture 10

Lecture 10

University

14 Qs

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Lecture 10

Lecture 10

Assessment

Quiz

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University

Practice Problem

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Created by

Lidiya Jose

Used 1+ times

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14 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is direct current (DC)?

A current that flows in one direction

A current that flows in multiple directions

A type of current used in AC systems

A type of current that changes direction periodically

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula for Ohm's law?

V = I x R

P = V x I

E = P x Time

I = V/R

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the power factor in AC circuits depend on?

The type of electrical load connected

The voltage supplied

The current flowing

The frequency of the supply

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the voltage between any two actives in a three-phase system?

1.73 times the single phase voltage

230 V

400 V

Zero

5.

OPEN ENDED QUESTION

3 mins • 1 pt

Fill in the blank: The electrical resistance of the cable is analogous to the ______ of the water flowing in the pipe.

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6.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

What are the advantages of 3 Phase Circuits?

Electric power is generated and distributed in the three-phase system only.

The instantaneous power in a three-phase system is always constant.

The amount of wire required for a 3-phase system is lesser than that required for an equivalent 1-phase system.

For similar power, the three-phase system is more economical than the single-phase.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the root mean square (rms) value of an alternating supply?

It is the equivalent value that gives the same power as a constant DC supply of the same voltage.

It is the maximum voltage of the AC supply.

It is the average voltage of the AC supply.

It is the minimum voltage of the AC supply.

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