Electrical 7

अब Quizwiz के साथ अपने होमवर्क और परीक्षाओं को एस करें!

In an RC parallel circuit, the current through the capacitor will be ___ with the current flow through the resistor

90* out of phase

The symbol for capacitive reactance is

X_c

Dividing a circuit's total applied voltage by the total impedance results in the total

current

In an AC circuit, the current continually changes direction and polarity, causing the ___ to appear to flow through the capacitor

current

A HIPOT is a test set used to test capacitor

dielectric

Polarized capacitors are also known as ___ capacitors

electrolytic

Energy in a capacitor is stored as a(n)

electrostatic charge

Capacitors charge and discharge at a(n) ___ rate

exponential

In an RC parallel circuit, the voltage across the resistor an dthe voltage across the capacitor will be

in phase

Increasing the surface area of the plates will cause the capacitance of a capacitor to

increase

The JAN standard is used to mark a capacitor intended for

military

Polarized capacitors

must be used with DC only

Capacitive reactance is measured in

ohms

A capacitor is constructed by separating two metal conductors called ___ with an insulating material called a ___

plates, dielectric

In a series RC circuit, the angle between the voltage and current is called angle theta (<0). The cosine of the angle is equal to the

power factor

In a capacitor, the amount of dielectric stress is proportional to

the voltage difference betweeen the plates

Power factor (PF) is the ratio of the ___ power to the ___ power

true, apparent

In a series RC circuit, the total impedance is the total current-limiting element in the circuit, and is calculated using the ___ sum of the resistance and reactances in a circuit

vector

When a capacitor and a resistor are connected in series, the time required to charge and discharge the capacitor depends on what is called the

RC time constant

Three factors determine the capacitance of a capacitor. List them.

Surface area of the plates, Distance between the plates, Type of dielectric used

T/F When a capacitor is connected to an AC circuit, current appears to flow through the capacitor due to the fact that the current continualy changes direction and polarity

TRUE

The power in a capacitor is reactive power. The unit of reactive power is the

VAR

Variable capacitors normally have a dielectric of

air

The insulating material between the plates is rated by a value called the

dielectric constant

The capacitive reactance of a capacitor is ___ proportional to the frequency of the applied voltage

inversely

In a purely capacitive circuit, the current will ___ the applied voltage by ___ degrees

lead, 90 degrees

In a capacitor, a small amount of current can flow from the negative plate to the ositive plate through the dielectric material, causing the capacitor to discharge. This is called ___ current

leakage

In an RC parallel circuit, the amount of phase angle shift between the total circuit current and voltage is determined by the ratio of the amount of ___ to the amount of ___

resistance, capacitance

The voltage rating of a capacitor

should never be exceeded


संबंधित स्टडी सेट्स

Pediatric Chronic Diarrhea in Children

View Set

CH.10 Incremental Analysis: The Key to Decision-Making

View Set

Ch 14 and 15 public speaking exam

View Set

ch.2 collecting subjective data; interview & health history

View Set

Python Final Exam, Python- Midterm 2

View Set