Electrical 2 module 1 Exam Questions An Answers
The hertz rating of a ac circuit is __ if the frequency is 20 cycles per 1/2 second - ANS 40 hertz
A circuit has an rms voltage of 120vac, the peak voltage is? - ANS 170v
The turns ratio of a transformer with 200 turns into primary and 10...
The hertz rating of a ac circuit is __ if the frequency is 20 cycles per 1/2 second - ANS 40 hertz
A circuit has an rms voltage of 120vac, the peak voltage is? - ANS 170v
The turns ratio of a transformer with 200 turns into primary and 100 turns in the secondary is __ - ANS
K
2:1
Opening the secondary of a CT (current transformer) underload will cause? - ANS Dangerously high
C
voltages
A circuit has a peak voltage of 275 V the average voltage is. How do you get that? - ANS 175.175v.
LO
275x.637
Three equal capacitors in series has __ of the applied voltage - ANS 1/3
The formula for inductive reactance is - ANS X(L) =2(pie)(f)(l)
YC
Current an inductive circuit __ the voltage - ANS Lags behind
The current an AC circuit With resistance only is __. the circuit has a resistance of 15 ohms and a voltage
of 150 V - ANS 10 amps
D
The calculations in AC circuits are done using __ unless stated otherwise - ANS Effective voltage value
Capacitive reactance __ when Frequency increases - ANS Decreases
U
The current in a capacitive of circuit __ the voltage - ANS Leads
ST
The average value of a AC sine wave is __ times the peak value - ANS 0.637
All DC rules and laws including Ohms law apply in AC circuits containing only __ - ANS Resistance
To increase the capacitance of a capacitor __ the area of plates - ANS Increase
They self induced voltage Cross and inductance is equal to the change in __ with respect to time - ANS
Current
What is the total capacity of 30 microfarad capacitor in parallel with a 15 microfarad capacitor - ANS 45
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