What Is the Peak Current to and From the Capacitor if the Emf Frequency Is 100 Hz?

(Last Updated On: Nov 13, 2020)

This is the Multiple Choice Questions Part 1 of the Series in AC Circuits as one of the Electrical Engineering science topic. In Preparation for the REE Lath Test brand certain to expose yourself and familiarize in each and every questions compiled here taken from various sources including but non express to past Board Exam Questions in Electrical Applied science field, Electrical Engineering Books, Journals and other Electrical Engineering science References.

Start Practice Test Test Questions Role 1 of the Series

SINUSOIDAL VOLTAGE AND CURRENT

Choose the letter of the best answer in each questions.

i. REE Board Exam September 2000

Find the average current during the one-half bicycle given the instantaneous maximum value of 20 amperes.

A. 12.73 amperes

B. xiv.xiv amperes

C. xx amperes

D. 10 amperes

View Reply:

Answer: Option A

Solution:

ii. REE Board Test April 1997

The phase shift between the current and voltage vectors us due to the post-obit except one

A. magnet coils

B. electric flat atomic number 26

C. power capacitors

D. fluorescent lamp

View Reply:

Answer: Option C

Solution:

3. REE Board Exam April 2001

An alternate rectangular moving ridge has a maximum value of 10 Five and a frequency of i cycle per second. What is the average value of the wave?

A. 5 5

B. 10 V

C. 0

D. 7.07 V

View Answer:

Respond: Choice B

Solution:

four. REE Board Exam October 2000

A sinusoidal current wave has a maximum value of xx A. What is the average value of 1-one-half cycle?

A. 5 A

B. 12.vii A

C. fourteen.14 A

D. 0

View Respond:

Answer: Choice C

Solution:

5. REE Board Test October 1996

What is the wavelength of a carrier wave with frequency of 100 megahertz?

A. 3.0 chiliad

B. seven.five yard

C. ane.v m

D. 6.0 g

View Answer:

Answer: Option A

Solution:

vi. REE Board Exam April 1997

A chart speed of a recording instrument is 25 mm/sec. Ane bike of the signal being recorded extends over five mm. What is the frequency of the bespeak?

A. 20 cps

B. two cps

C. 50 cps

D. 5 cps

View Answer:

Respond: Pick D

Solution:

7. EE Lath Exam Apr 1992

Determine the rms value of the current drawn by a two μF condenser, which is continued across a source of potential. The potential has a third and 5th harmonic components, which are xxx% and 20% respectively of the central. The fundamental sinusoidal component has a peak value of 1000 volts and 60 Hz frequency.

A. 0.89 A

B. 0.75 A

C. 0.91 A

D. 0.84 A

View Answer:

Reply: Option A

Solution:

viii. EE Board Exam April 1990

A 240-V, 25 Hz sinusoidal generator is connected to a 20 ohms resistor. Make up one's mind the instantaneous current when elapsed time is 0.01 second.

A. 15.43 A

B. 16.30 A

C. 16.97 A

D. 12.00 A

View Answer:

Answer: Option C

Solution:

ix. REE Board Exam Apr 1997

A wire carries a current i = 3 cos 314t amperes. What is the boilerplate current over 6 seconds?

A. 0 A

B. iii.0 A

C. 1.5 A

D. 0.532 A

View Answer:

Reply: Option A

Solution:

10. REE Board Examination Apr 1997

Across a 230-V, 60 Hz power supply is a fifteen-ohm non-inductive resistor. What is the equation of the resulting electric current?

A. i = 21.68 sin 377t

B. i = 26.56 sin 377t

C. i = fifteen.33 sin 377t

D. i = 28.16 sin 120t

View Answer:

Answer: Option A

Solution:

11. EE Board Exam April 1991

Determine the effective value of the circuit current of an emf of 151 sin 377t is continued in series with a DC emf of 110 volts. Both supply a load of 10 + j8 ohms.

A. 10.3 A

B. 12.5 A

C. 13.eight A

D. 11.four A

View Reply:

Respond: Option C

Solution:

12. EE Board Exam April 1994

An alternating current and a direct current menstruum simultaneously in the same conductor. If the constructive of the alternating current is 5 A and the straight current is 10 A, what will an AC ammeter read when connected in the circuit?

A. 7.five A

B. 15 A

C. 11.18 A

D. none of these

View Respond:

Answer: Pick C

Solution:

xiii. REE Board Test April 1997

If e = 100 sin (ωt – 30°) – 50 cos 3ωt + 25 sin (5ωt + 150°) and i = 20 sin (ωt + 40°) + 10 sin (3ωt + 30°) – five sin (5ωt – l°). Summate the ability in watts.

A. 1177

B. 919

C. 1043

D. 1224

View Respond:

Respond: Option B

Solution:

14. ECE Board Exam Nov 2001

It is the value of sine wave of voltage or electric current at one particular instant of time.

A. boilerplate value

B. constructive value

C. rms value

D. instantaneous value

View Reply:

Answer: Option D

Solution:

15. ECE Board Examination November 1998

If the combination of an ac voltage and a dc voltage has an instantaneous voltage that varies through a range from -two V to +10 5, what is the acme ac voltage of the combination?

A. x Five

B. 16 Five

C. half dozen V

D. 12 V

View Respond:

Reply: Option D

Solution:

16. ECE Board Examination April 2001

Measured in Hertz, it is the number of cycles of alternating current per 2nd.

A. frequency

B. period

C. peak to peak

D. wavelength

View Reply:

Answer: Option A

Solution:

17. ECE Lath Exam April 2000

If an ac signal has an average voltage of 18 V, what is the rms voltage?

A. xvi.2 V

B. xix.98 5

C. 25.38 Five

D. 12.73 V

View Respond:

Answer: Selection B

Solution:

18. ECE Board Exam April 2000

If an ac betoken has a height voltage of 55 5, what is the average value voltage?

A. 61.05 V

B. 38.86 V

C. 34.98 5

D. 86.35 V

View Answer:

Reply: Option C

Solution:

19. ECE Lath Test April 1999

What is the stage relationship between current and voltage in an inductor?

A. in phase

B. current lags voltage past ninety°

C. voltage lags electric current past 90°

D. electric current lags voltage by 180°

View Respond:

Answer: Choice B

Solution:

20. ECE Lath Examination November 1995

If sine wave voltage varies from 0 to 200 5, how much is its instantaneous voltage at xc°?

A. 100 V

B. minimum voltage

C. 200 V

D. half of its maximum voltage

View Answer:

Reply: Option C

Solution:

21. ECE Board Exam Nov 2000

How many degrees are there in one consummate wave cycle?

A. 360 degrees

B. 90 degrees

C. 180 degrees

D. 720 degrees

View Answer:

Respond: Option A

Solution:

22. ECE Board Exam Apr 1998

When comparing rms voltage and boilerplate voltages, which of the following statement is truthful, assuming sine waves?

A. Either the rms voltage or the average voltage might exist larger.

B. The boilerplate voltage is always greater than the rms voltage.

C. There will e'er be a very large difference between the rms voltage and the average voltage.

D. The rms voltage is always greater than the average voltage.

View Answer:

Reply: Option D

Solution:

23. ECE Board Test November 1999

It is the maximum instantaneous value of a varying current, voltage, or ability equal to ane.414 times the effective value of a sine wave.

A. rms value

B. height to peak value

C. effective value

D. peak value

View Respond:

Answer: Pick D

Solution:

24. ECE Board Exam November 1999

It is the description of two sine waves that are in step with each other going through their maximum and minimum points at the same time and in same direction.

A. stepped sine waves

B. sine waves in coordination

C. phased sine waves

D. sine waves in phase

View Answer:

Respond: Option D

Solution:

25. ECE Board Test April 1999

What is the average voltage (Due east_ave) output of a full moving ridge rectifier with an output of 100 volts acme?

A. 63.7 volts

B. 14.fourteen volts

C. 141.iv volts

D. 6.37 volts

View Answer:

Answer: Choice A

Solution:

26. ECE Lath Exam Nov 1997

The relation of the voltage across an inductor to it current is _______

A. Lagging the electric current by 90 degrees

B. Leading the current by 90 degrees

C. In stage with the current

D. Leading the current by 180 degrees

View Answer:

Respond: Selection B

Solution:

27. ECE Board Exam April 1999

If two equal frequency ac signals of exactly 5 V each are combined with one of the signals 180 degrees out of phase with the other, what will be the value of the resultant voltage?

A. two.25 V

B. five 5

C. 0 Five

D. ten 5

View Answer:

Respond: Choice C

Solution:

28. ECE Lath Exam November 1998

Kind of electrical current where amplitude drops to zero periodically usually produced by rectifier circuits

A. alternate current

B. varying direct current

C. damped alternate current

D. pulsating direct current

View Respond:

Answer: Selection D

Solution:

29. ECE Board Test April 2000

If an air-conditioning signal has an average voltage of eighteen V, what is the rms voltage?

A. 16.ii V

B. 19.98 V

C. 25.38 V

D. 12.726 V

View Answer:

Answer: Option B

Solution:

30. ECE Board Exam April 2001

In electronic circuit the current that flows over a capacitor _____.

A. In phase with the voltage

B. Leads the voltage by 180 degrees

C. Lags the voltage by 90 degrees

D. Leads the voltage by 90 degrees

View Reply:

Answer: Option D

Solution:

31. Two current sources evangelize current to a common load. The first source delivers a electric current whose equation is 25 sin 100πt amperes while the 2d delivers a electric current whose equation is 15 cos 100πt amperes. What is the rms value of the current in the load?

A. 29.fifteen A

B. 40 A

C. 20.6 A

D. 10 A

View Answer:

Reply: Selection C

Solution:

32. Two alternators A and B delivers 100 A and 150 A, respectively to a load. If these currents are out of phase by 30 electrical degrees, determine the total current drawn by the load.

A. 201.5 A

B. 250.0 A

C. 215.4 A

D. 241.eight A

View Answer:

Answer: Option D

Solution:

33. When using circuit laws and rules we must use

A. maximum value

B. average value

C. effective value

D. peak to peak value

View Reply:

Answer: Option C

Solution:

34. A 60 Hz frequency would cause an electric light to

A. turn on and off 120 times per second

B. flicker noticeable

C. turn on and off 180 times per second

D. turn on and off 60 times per second

View Answer:

Answer: Option A

Solution:

35. The human relationship between frequency f, number of revolutions per 2d n and pair of poles p is given past

A. f = n/p

B. f = np

C. f = n/2p

D. f = 2np

View Answer:

Reply: Selection B

Solution:

36. The divergence betwixt the peak positive value and the elevation negative of an a.c. voltage is called the

A. maximum value

B. effective value

C. average value

D. peak to tiptop value

View Answer:

Answer: Option D

Solution:

37. The greatest value attained during one half of the cycle is called the

A. peak value

B. boilerplate value

C. r.m.s. value

D. constructive value

View Reply:

Reply: Pick A

Solution:

38. The root mean square (r.g.s.) value of a.c. is the same as

A. instantaneous value

B. average value

C. constructive value

D. maximum value

View Reply:

Answer: Selection C

Solution:

39. The r.m.s. value of a sine wave is equal to

A. 0.637 maximum value

B. 0.506 maximum value

C. 0.707 maximum value

D. i.414 maximum value

View Respond:

Answer: Option C

Solution:

40. Form gene is defined as

A. r.g.s. value/peak value

B. maximum value/r.one thousand.due south. value

C. r.chiliad.southward. value/average value

D. effective value/ r.thou.s. value

View Answer:

Respond: Option C

Solution:

41. The value of form gene for a pure sine wave is

A. i.414

B. 0.637

C. 0.707

D. i.11

View Reply:

Answer: Option D

Solution:

42. The value of peak factor for a pure sine wave is

A. one.414

B. 0.637

C. 0.707

D. 1.eleven

View Answer:

Answer: Option A

Solution:

43. If the current and voltage are out of phase by 90°, the ability is

A. 1.1 VI

B. minimum

C. Maximum

D. zero

View Answer:

Respond: Choice D

Solution:

44. If due east₁ = A sin ωt and e₂ = B sin (ωt – θ) then

A. e_i lags due east₂ by θ

B. eastward₂ leads e₁ past θ

C. e₂ lags e1 by θ

D. e₁ leads e_two by θ

View Respond:

Answer: Selection B

Solution:

45. Which of the post-obit statements concerning the graph of figure below is nearly correct?

A. it represents ac

B. it represents dc

C. it represents half-wave rectified ac

D. information technology represents sum of air conditioning and dc

View Reply:

Answer: Pick D

Solution:

46. Boilerplate value of a sine moving ridge is √2 times the maximum value

A. True

B. Imitation

View Answer:

Answer: Option B

Solution:

47. The equation for 25 cycles electric current sine moving ridge having rms value of thirty amperes volition be

A. thirty sin 25t

B. 42.4 sin 25πt

C. 30 sin 50t

D. 42.iv sin 50πt

View Respond:

Respond: Option D

Solution:

48. The voltage v = 90 cos (ωt – 161.5°) may exist represented as a sine function by

A. 90 sin (ωt + 18.5°)

B. 90 sin (ωt – 71.5°)

C. xc sin (ωt + 71.5°)

D. 90 sin (ωt – eighteen.five°)

View Answer:

Answer: Option B

Solution:

49. Which of the following frequencies has the longest flow?

A. ane Hz

B. 10 Hz

C. ane kHz

D. 100 kHz

View Answer:

Answer: Option A

Solution:

50. RMS value and the mean value is the same in instance of

A. square wave

B. sine wave

C. triangular wave

D. half-wave rectified sine wave

View Reply:

Answer: Option A

Solution:

⇒ MCQ in AC Circuits Part two | REE Board Exam

Questions and Answers in AC Circuits

Post-obit is the list of practice exam examination questions in this brand new serial:

MCQ in Air conditioning Circuits

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