Electronic Principles
The period of a waveform is:

the number of cycles completed in one second
equal to 0.707 times the peak amplitude
the time required for the voltage to rise from 10% to 90% of the peak amplitude
the time required to complete one full cycle
None of these

ANSWER DOWNLOAD EXAMIANS APP

Electronic Principles
For a pure capacitor:

ac current is converted to dc voltage
ac current lags the voltage by 90 degree
ac current leads the voltage by 90 degree
None of these
ac current and voltage are exactly in phase

ANSWER DOWNLOAD EXAMIANS APP

Electronic Principles
Which one of the following statements best describes magnetic hysteresis?

Hysteresis is most apparent when the current through the coil of an electromagnet changes frequently
Hysteresis is most apparent when a steady amount of current is lowing through the coil of an electromagnet
Hysteresis is the amount of magnetic flux that is not confined to the core material of an electromagnet
None of these
Hysteresis is most apparent when the core material is saturated

ANSWER DOWNLOAD EXAMIANS APP

Electronic Principles
A low-pass filter:

passes lower-frequency signals and reduces higher-frequency signals
reduces the level of all frequencies by a significant amount
has no effect on ac signals
passes higher-frequency signals and reduces lower-frequency signals
None of these

ANSWER DOWNLOAD EXAMIANS APP