Electrical 8

Pataasin ang iyong marka sa homework at exams ngayon gamit ang Quizwiz!

T/F A PI filter is so-named because the input signal is multiplied by 3.14 to obtain an output signal

FALSE

The bandwith of a filter depends on the ___ of the compnents

Q

T/F A T filter is so-named because a schematic of the circuit looks like a letter T

TRUE

Electronic equipment often needs to separate frequencies. Some frequencies are allowed to pass, while others are rejected. A circuit that separates these frequencies is called a

filter

Filters which offer high opposition to current flow when the frequency is low with little opposition to current flow above a certain frequency is called what type of filter?

high-pass

Power factor correction of motors can be done by connecting a capacitor in parallel with the motor. This is essentially the same thing as creating a ___ circuit which is near resonance

inductive-capacitive-parallel

The most common method of tuning over a broadband of frequencies is by switching from one set of ___ to another, then use a variable ___ to adjust the frequency

inductors, capacitor

In a series RLC circuit, if the circuit contains more inductive VARs than capacitive VARs, then the circuit has a ___ power factor

lagging

In a series RLC circuit, if the current is behind the voltage, the power factor is referred to as

lagging

In a series RLC circuit, if the voltage is ahead of the current, the power factor is refrred to as

lagging

In an RLC parallel circuit, if the circuit contains more inductive VARs than capacitive VARs, then the circuit has a ___ power factor

lagging

In a series RLC circuit, if the circuit contains more capacitive VARs than inductive VARs, then the circuit has a ___ power factor

leading

In an RLC parallel circuit, if the circuit contains more capacitive VARs than inductive VARs, then the circuit has a ___ power factor

leading

Filters which offer little opposition to current flow when the frequency is low is called what type of filter?

low-pass

Some filters eliminate a narrow band of frequencies. These filters are called either band-rejection or ___ filters

notch

Frequencies which are offered much opposition to in a circuit are considered to be

rejected

A band-rejection filter is one that

rejects a range of frequencies while passing frequencies on either side

PI-type filters are so named because they

resemble the Greek letter pi

T filters are so named because they

resemble the letter T

In a series RLC circuit, the point at which X_L and X_c are equal is called

resonance

LC circuit impedance changes with frequency. What type of circuit has high impedance at its resonant frequency and low impedance at all other frequencies

tank

Inductive/capacitive (LC) parallel circuits are often referred to as what type of circuit?

tank circuit

Since components are not made to exact values, some small amount of adjustment is normally required. Adjustable inductors and capacitors are called

trimmer

If the power factor is corrected exactly so that the circuit is purely resistive, then the power factor has a value of

unity

In an RLC parallel circuit, the ___ is the same through all components and the ___ are out of phase

voltage, currents

In an RLC series circuit, the inductive and capacitive reactance are out of phase by ___

180*

A notch filter is also called what type of filter?

band-rejection

Filters that reject a range of frequencies while passing frequencies on either side are called

band-rejection

Filters that pass a certain range of frequencies while rejecting frequencies on either side are called

bandpass

In a parallel LC circuit, the difference in frequencies above and below resonance at which impedance is 0.707 of the maximum is called the ___ of the circuit

bandwidth

The Q of a component is a primary factor in determining what characteristic of a filter?

bandwidth

The difference between the two frequencies at which the current is 0.707 of the maximum is the

bandwidth

Frequencies which are offered little oposition to in a circuit are considered to be

passed

A bandpass filter is one that

passes a range of frequencies while rejecting frequencies on either side

A high-pass filter is one that

passes frequencies above a certain point

A low-pass filter is one that

passes frequencies below a certain point


Kaugnay na mga set ng pag-aaral

Field Tech III - IV Conventional-TCP/IP PROTOCOLS (190E40-3)

View Set

Ch. 23: Infection Control (NUR 111-fundamentals book)

View Set

Chapter 14 Power, Influence, & Leadership

View Set

Spinal cord injuries nursing 4 test 1

View Set

FINAL EXAM REVIEW MANAGERIAL ACCT

View Set

Communicating Effectively Midterm

View Set

Unit 4 Test: Ancient China (Chapters 19,20,21)

View Set