# Neets Module 2 Assignment 4 Answers To Impossible Quiz

1.

Alternating current can be defined as current that varies in

A.

B.

C.

D.

2.

Before a 120-volt dc source can be used to power a 12-volt load, the voltage must be reduced. Which of the following methods can be used?

A.

A resistor placed in parallel with the load

B.

A resistor placed in series with the load

C.

A step-down transformer placed in series with load

D.

A step-down transformer placed in parallel-with the load

3.

Alternating current has replaced direct current in modern transmission systems because it has which of the following advantages?

A.

Ac can be transmitted with no line loss

B.

Ac can be transmitted at higher current levels

C.

Ac can be transmitted at lower voltage levels

D.

Ac can be readily stepped up or down

4.

A waveform is a graphic plot of what quantities?

A.

B.

C.

D.

Magnitude versus amplitude

5.

Which of the following properties surrounds a current-carrying conductor?

A.

B.

C.

D.

6.

Which of the following statements accurately describes the magnetic field surrounding a current-carrying conductor?

A.

It is parallel to and equal along all parts of the conductor

B.

It is parallel to and maximum at the most negative part of the conductor

C.

It is perpendicular to and equal along all parts of the conductor

D.

It is perpendicular to the conductor and maximum at the most negative point of the conductor

7.

Which of the following factors determine(s) the intensity of a magnetic field surrounding a coil?

A.

The amount of current flow through the coil

B.

The type of core material

C.

The number of turns in the conductor

D.

8.

When you grasp a coil in your left hand with your thumb pointing in the direction of the north pole, your fingers will be wrapped around the coil in the direction of the

A.

B.

C.

D.

9.

The power consumed in a conductor in realigning the atoms which set up the magnetic field is known as what type of loss?

A.

B.

C.

D.

10.

The magnetic field surrounding a straight conductor is (a) what shape, and (b) is in what position relative to the conductor?

A.

(a) Linked oblong (b) Parallel

B.

(a) Concentric circles (b) Parallel

C.

(a) Linked oblong (b) Perpendicular

D.

(a) Concentric circles (b) Perpendicular

11.

Why is a two-pole magnetic field set up around a coil?

A.

Because separate lines of magnetic force link and combine their effects

B.

Because concentric lines of force cross at right angles and combine.

C.

Because lines of force are separated and bent at the coil ends

D.

Because separate lines of force are attracted to the two poles of the coi

12.

When a conductor is moving parallel to magnetic lines of force, (a) what relative number of magnetic lines are cut, and (b) what relative value of emf is induced?

A.

B.

C.

D.

13.

When the induced voltage in a conductor rotating in a magnetic field is plotted against the degrees of rotation, the plot will take what shape?

A.

B.

C.

D.

14.

When a loop of wire is rotated through 360º in a magnetic field, the induced voltage will be zero at which of the following points?

A.

B.

C.

D.

15.

When a loop of wire is rotated 360º in a magnetic field, at what points will the induced voltage reach its maximum (a) positive, and (b) negative values?

A.

B.

C.

D.

16.

When a coil of wire makes eight complete revolutions through a single magnetic field, (a) what total number of alternations of voltage will be generated and, (b) what total number of cycles of ac will be generated?

A.

B.

C.

D.

17.

According to the left-hand rule for generators, when your thumb points in the direction of rotation, your (a) forefinger and (b) your middle finger will indicate the relative directions of what quantities?

A.

(a) Current, (b) Magnetic flux, south to north

B.

(a) Current, (b) Magnetic flux, north to south

C.

(a) Magnetic flux, south to north, (b) Current

D.

(a) Magnetic flux, north to south, (b) Current

18.

Continuous rotation of a conductor through magnetic lines of force will produce what type of (a) voltage and (b) waveform?

A.

B.

(a) Dc, (b) continuous level

C.

D.

(a) Dc, (b) pulsating wave

19.

What is the term for the number of complete cycles of ac produced in one second?

A.

B.

C.

D.

20.

What is the unit of measurement for frequency?

A.

B.

C.

D.

21.

A loop of wire rotating at 60 rpm in a magnetic field will produce an ac voltage of what frequency?

A.

B.

C.

D.

22.

Www.eceboardexams.tk An ac voltage of 250 hertz has a period of

A.

B.

C.

D.

23.

More quizzes found at www.eceboardexams.tk What is the approximate frequency of an ac voltage that has a period of .0006 second?

A.

B.

C.

D.

24.

More quizzes found at www.eceboardexams.tk Component a is a measure of what quantity?

A.

B.

C.

D.

25.

more quizzes found at www.eceboardexams.tk Component a differs from component b in which of the following characteristics

A.

B.

C.

D.

26.

more quizzes found at www.eceboardexams.tk Component c would represent what quantities if it were expressed as (a) physical distance, and (b) time?

A.

B.

(a) Period (b) wavelength

C.

(a) Frequency (b) wavelength

D.

(a) Wavelength (b) period

27.

more quizzes found at www.eceboardexams.tk The combined values of components a and b represent what ac value?

A.

B.

C.

D.

28.

more quizzes found at www.eceboardexams.tk A peak voltage is represented by which of the following components?

A.

B.

C.

D.

29.

more quizzes found at www.eceboardexams.tk An ac voltage has a frequency of 350 Hz. In two seconds, what total number of times will the peak value of voltage be generated?

A.

B.

C.

D.

30.

more quizzes found at www.eceboardexams.tk The value of current of an ac waveform taken at any particular moment of time is what type of value?

A.

B.

C.

D.

31.

more quizzes found at www.eceboardexams.tk While the value of an ac voltage may be expressed as one of several values, the accepted practice is to express it as what type value?

A.

B.

C.

D.

32.

more quizzes found at www.eceboardexams.tk The total of ten instantaneous values of an alternation divided by ten is equal to what value?

A.

B.

C.

D.

33.

more quizzes found at www.eceboardexams.tk Which of the following mathematical formulas is used to find the average value of voltage for an ac voltage?

A.

B.

C.

D.

34.

more quizzes found at www.eceboardexams.tk What is the average value of all of the instantaneous voltages occurring during one cycle of an ac waveform with a peak value of 60 volts?

A.

B.

C.

D.

35.

more quizzes found at www.eceboardexams.tk If an ac voltage has an Emax of 220 volts, what is Eavg?

A.

B.

C.

D.

36.

more quizzes found at www.eceboardexams.tk . If an ac waveform has a peak-to-peak value of 28 volts, what is E avg?

A.

B.

C.

D.

37.

more quizzes found at www.eceboardexams.tk If an ac waveform has a peak value of 4.5 amperes, what is its average value?

A.

B.

C.

D.

38.

more quizzes found at www.eceboardexams.tk If the average value of current of an ac waveform is 1.2 amperes, what is its maximum value of current?

A.

B.

C.

D.

39.

more quizzes found at www.eceboardexams.tk The value of alternating current that will heat a resistor to the same temperature as an equal value of direct current is known as

A.

B.

C.

D.

40.

more quizzes found at www.eceboardexams.tk The rms value for an ac voltage is equal to what other ac value?

A.

B.

C.

D.

41.

More quizzes found at www.eceboardexams.tk What value will result by squaring all values for Einst, averaging these values, and then taking the square root of that average?

A.

B.

C.

D.

42.

More quizzes found at www.eceboardexams.tk The accepted, nominal value for household power in the United States is 120-volts, 60 Hz. What is the value of maximum voltage?

A.

B.

C.

D.

43.

More quizzes found at www.eceboardexams.tk An ac voltmeter is usually calibrated to read which of the following ac values?

A.

B.

C.

D.

44.

More quizzes found at www.eceboardexams.tk If the maximum value for an ac voltage is known, the Eeff can be found by using which of the following formulas?

A.

B.

C.

D.

45.

More quizzes found at www.eceboardexams.tk If the Ieff of an ac waveform is 3.25 amperes, what is Imax?

A.

B.

C.

D.

46.

more quizzes found at www.eceboardexams.tk If the rms value of the voltage of an ac waveform is 12.4 volt what is its average value? (Hint: compute Emax first.)

A.

B.

C.

D.

47.

more quizzes found at www.eceboardexams.tk Which of the following is an important rule to remember when using Ohm's Law to solve ac circuit problems?

A.

Always solve for resistance first

B.

Give the answer as effective value

C.

D.

Convert all given values to effective before attempting to solve

48.

more quizzes found at www.eceboardexams.tk An ac circuit is composed of three 20- ohm resistors connected in parallel. The average voltage supplied to this circuit is 62-volts ac. What is the maximum current?

A.

B.

C.

D.

49.

more quizzes found at www.eceboardexams.tk If the ac source in question 1-62 is raised to an average value of 120 volts, what is the Ieff?

A.

B.

C.

D.

50.

more quizzes found at www.eceboardexams.tk If Eeff is 150 volts and Imax is 4.5 amperes, what is the total resistance (RT) of a circuit?

A.

B.

C.

D.

Prepared by: Harlem A. Agnote

occurs?1. The nucleus becomes lighter2. The atom becomes an ion

3. Light energy is emitted

4. The valence of the atom changes1-11. The number of electrons in the outermostshell of an atom determines which of thefollowing characteristics of the atom?

1. Valence

2. Atomic weight3. Atomic number4. Number of shells1-12. When an atom gains or loses an electron,which of the following terms applies?1. Unbalanced2. Lightened3. Neutral

4. Ionized

1-13. What is the main difference betweenconductors, semiconductors, andinsulators?1. The temperature differences2. The physical state of their mass

3. The number of free electrons

4. The designations of the outer shells1-14. A substance with an excess of electrons isconsidered to be in what electrical state?1. Neutral2. Positive

3. Negative

4. Discharged1-15. Which of following actions describes theeasiest way to accumulate a static electriccharge?1. Friction between two conductors

2. Friction between two insulators

3. Pressure between two conductors4. Pressure between two insulators1-16. An atom that contains 6 protons and 5electrons has what electrical charge?

1. Positive

2. Negative3. Neutral4. Intermediate1-17. How do "like" and "unlike" charges reacttoone another?1. Unlike charges repel each other, likecharges repel each other2. Unlike charges attract each other, likecharges attract each other3. Unlike charges repel each other, likecharges attract each other

4. Unlike charges attract each other, likecharges repel each other

1-18. What is/are the term(s) applied to thespacebetween and around charged bodies inwhich their influence is felt?

1. Electric field of force

2. Electrostatic field3. Dielectric field4. Each of the above1-19. Electrostatic lines of force are drawn inwhich of the following manners?1. Entering negative charge, enteringpositive charge

2. Entering negative charge, leavingpositive charge

3. Leaving negative charge, leavingpositive charge4. Leaving negative charge, enteringpositive charge1-20. Which of the following devices usemagnetism?

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