WorksheetsAlternating Current
Total questions: 10
Worksheet time: 3mins
What is meant by Alternating Current?
An electric current whose direction change periodically
An electric current whose magnitude change periodically
An electric current whose magnitude and direction change periodically
An electric current whose magnitude or direction change periodically
The graph of alternating current or alternating voltage is a_________form.
square
sinusoidal
triangle
sawtooth
In alternating current equation, I=Io sin ωt , Io is the
Instantaneous current
Lowest current
RMS current
Peak current
Root mean square current is defined as
the value of the steady DC which produces the same power in a resistor as the mean (average) power produced by the AC.
the value of the steady DC which produces the same power in a capacitor as the mean (average) power produced by the AC.
the value of the steady AC which produces the same power in a resistor as the mean (average) power produced by the DC.
the value of the steady AC which produces the same power in a capacitor as the mean (average) power produced by the DC.
The root mean square current ( Irms ) is the ________________ value of the alternating current.
peak
least
average
effective
What is phasor diagram?
A vector that rotates clockwise about its axis with constant angular velocity
A vector that rotates anticlockwise about its axis with constant angular velocity
A vector that rotates anticlockwise about its axis with constant angular acceleration
A vector that rotates clockwise about its axis with constant angular acceleration
Phase angle is the __________
total phase between current and voltage in DC circuit.
phase difference between current and voltage in DC circuit.
total phase between current and voltage in AC circuit.
phase difference between current and voltage in AC circuit.
In a pure resistor circuit, _______________
the voltage and current are in antiphase.
the voltage leads current by 2π rad.
the voltage and current are in phase.
the current leads voltage by 2π rad.
In a pure capacitor circuit, ______________
the current leads voltage by 2π rad.
the current and voltage are in phase
the voltage leads current by 2π rad.
the current and voltage are in antiphase
In a pure inductor circuit, ______________
the current and voltage are in antiphase.
the voltage leads current by 2π rad.
the current leads voltage by 2π rad.
the current and voltage are in phase.
