AC FUNDAMENTALS, CIRCUIT AND CIRCUIT THEORY QUIZ

For a sine wave with peak value Emax ___________ the average value is

0.707 Emax

None of the listed here

0.636 Emax

0.434 Emax

TRUE ANSWER : ?
YOUR ANSWER : ?

Magnitude of current at resonance in R-L-C circuit

Depends upon the magnitude of R

Depends upon the magnitude of R, Land C

Depends upon the magnitude of C

Depends upon the magnitude of L

TRUE ANSWER : ?
YOUR ANSWER : ?

The main cause of silting up a channel,

Defective head regulator

Inadequate slope

Non-regime section

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

All the rules and laws of D.C. circuit also apply to A.C. circuit containing

Resistance only

Capacitance only

Inductance only

All above

TRUE ANSWER : ?
YOUR ANSWER : ?

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

R2C

R/C

RC2

RC

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following refers to a parallel circuit?

The equivalent resistance is greater than any one of the resistors

The current through any one element is less than the source current

The voltage across element is in proportion to it's resistance value

The current through each element is same

TRUE ANSWER : ?
YOUR ANSWER : ?

The r.m.s. value of pure cosine function is

Zero

0.707 of peak value

Same as peak value

0.5 of peak value

TRUE ANSWER : ?
YOUR ANSWER : ?

In a series L-C circuit at the resonant frequency the

Impedance is maximum

Current is minimum

Current is maximum

Voltage across C is minimum

TRUE ANSWER : ?
YOUR ANSWER : ?

The period of a sine wave is ___________ seconds. Its frequency is

20 Hz

50 Hz

40 Hz

30 Hz

TRUE ANSWER : ?
YOUR ANSWER : ?

The phase difference between voltage and current wave through a circuit element is given as 30Â°. The essential condition is that

Both waves must have same frequency

Both waves must have identical peak values

None of these

Both waves must have zero value at the same time

TRUE ANSWER : ?
YOUR ANSWER : ?