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Exam (elaborations)

Electrical 2 module 1 Exam Questions An Answers

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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...

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  • August 27, 2024
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Electrical 2 module 1

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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