Electrical 2 module 1
The hertz rating of a ac circuit is __ if the frequency is 20 cycles per 1/2 second - ANS40 hertz
A circuit has an rms voltage of 120vac, the peak voltage is? - ANS170v
The turns ratio of a transformer with 200 turns into primary and 100 turns in the secondary is __
- ANS2:1
Opening the secondary of a CT (current transformer) underload will cause? - ANSDangerously
high voltages
A circuit has a peak voltage of 275 V the average voltage is. How do you get that? -
ANS175.175v. 275x.637
Three equal capacitors in series has __ of the applied voltage - ANS1/3
The formula for inductive reactance is - ANSX(L) =2(pie)(f)(l)
Current an inductive circuit __ the voltage - ANSLags behind
The current an AC circuit With resistance only is __. the circuit has a resistance of 15 ohms and
a voltage of 150 V - ANS10 amps
The calculations in AC circuits are done using __ unless stated otherwise - ANSEffective
voltage value
Capacitive reactance __ when Frequency increases - ANSDecreases
The current in a capacitive of circuit __ the voltage - ANSLeads
The average value of a AC sine wave is __ times the peak value - ANS0.637
All DC rules and laws including Ohms law apply in AC circuits containing only __ -
ANSResistance
To increase the capacitance of a capacitor __ the area of plates - ANSIncrease
They self induced voltage Cross and inductance is equal to the change in __ with respect to
time - ANSCurrent
The hertz rating of a ac circuit is __ if the frequency is 20 cycles per 1/2 second - ANS40 hertz
A circuit has an rms voltage of 120vac, the peak voltage is? - ANS170v
The turns ratio of a transformer with 200 turns into primary and 100 turns in the secondary is __
- ANS2:1
Opening the secondary of a CT (current transformer) underload will cause? - ANSDangerously
high voltages
A circuit has a peak voltage of 275 V the average voltage is. How do you get that? -
ANS175.175v. 275x.637
Three equal capacitors in series has __ of the applied voltage - ANS1/3
The formula for inductive reactance is - ANSX(L) =2(pie)(f)(l)
Current an inductive circuit __ the voltage - ANSLags behind
The current an AC circuit With resistance only is __. the circuit has a resistance of 15 ohms and
a voltage of 150 V - ANS10 amps
The calculations in AC circuits are done using __ unless stated otherwise - ANSEffective
voltage value
Capacitive reactance __ when Frequency increases - ANSDecreases
The current in a capacitive of circuit __ the voltage - ANSLeads
The average value of a AC sine wave is __ times the peak value - ANS0.637
All DC rules and laws including Ohms law apply in AC circuits containing only __ -
ANSResistance
To increase the capacitance of a capacitor __ the area of plates - ANSIncrease
They self induced voltage Cross and inductance is equal to the change in __ with respect to
time - ANSCurrent
