A.C. Fundamentals | Circuits and Circuit Theory

The r.m.s. value of pure cosine function is_________?

Byadmin December 11, 2018July 18, 2021

The r.m.s. value of pure cosine function is_________?

A. 0.5 of peak value
B. 0.707 of peak value
C. same as peak value
D. zero

A.C. Fundamentals | Circuits and Circuit Theory

When an alternating current passes through an ohmic resistance the electrical power converted into heat is__________?

When an alternating current passes through an ohmic resistance the electrical power converted into heat is__________?

A. apparent power
B. true power
C. reactive power
D. none of the above

Read More When an alternating current passes through an ohmic resistance the electrical power converted into heat is__________?
A.C. Fundamentals | Circuits and Circuit Theory

A pure capacitor connected across an A.C. voltage consumed 50 W. This is due to________?

A pure capacitor connected across an A.C. voltage consumed 50 W. This is due to________?

A. the capacitive reactance in ohms
B. the current flowing in capacitor
C. the size of the capacitor being quite big
D. the statement is incorrect

Read More A pure capacitor connected across an A.C. voltage consumed 50 W. This is due to________?
A.C. Fundamentals | Circuits and Circuit Theory

The peak value of a sine wave is 200 V. Its average value is___________?

The peak value of a sine wave is 200 V. Its average value is___________?A. 127.4 V
B. 141.4 V
C. 282.8 V
D. 200V

Read More The peak value of a sine wave is 200 V. Its average value is___________?
A.C. Fundamentals | Circuits and Circuit Theory

The r.m.s. value and mean value is the same in the case of___________?

The r.m.s. value and mean value is the same in the case of___________?

A. triangular wave
B. sine wave
C. square wave
D. half wave rectified sine wave

Read More The r.m.s. value and mean value is the same in the case of___________?
A.C. Fundamentals | Circuits and Circuit Theory

The time constant of a series R-C circuit is given by____________?

The time constant of a series R-C circuit is given by____________?

A. R/C
B. RC2
C. RC
D. R2C

Read More The time constant of a series R-C circuit is given by____________?
A.C. Fundamentals | Circuits and Circuit Theory

The product of apparent power and cosine of the phase angle between circuit voltage and current is

The product of apparent power and cosine of the phase angle between circuit voltage and current is

A. true power
B. reactive power
C. volt-amperes
D. instantaneous power

Read More The product of apparent power and cosine of the phase angle between circuit voltage and current is

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