Type
Crossword
Description

A differential amplifier is a part of an Op-amp
In the common mode an identical signal appears in i/ps
The common-mode gain is very low
The differential gain is very high
If Vin is 0, Vo is zero
The use of negative feedback reduces the voltage gain
Negative feedback increases the Zin and B.W
A voltage follower has voltage gain of 1
Op-amp can amplify both a.c. and d.c.
The input offset current equals difference between base currents
The tail current in a differential amplifier equals sum of two emitter currents
A common-mode signal is applied to both iputs
The input stage of an Op-amp is usually a differential amplifier
Current cannot flow to ground through a virtual ground
emitter-follower has high Zin and low Zo
An ideal OPAMP has B.W infinite
In a nonlinear op-amp circuit Op amp may saturate
A digital-to-analog converter is an application of scaling adder
Ideal OPAMP is an voltage controlled voltage source
two i/p terminals of OPAMP is labelled as inverting & noninverting
Open loop gain of an amplifier can be represented by Vo/Vi
In op-amp signal applied at inverting terminal appears at output terminal with a phase 180
Another name for a unity gain amplifier is: voltage follower
If ground is applied to the (+) terminal of an inverting op-amp, the (–) terminal will: be virtual ground
The ratio between differential gain and common-mode gain is called common-mode rejection
The major difference between ground and virtual ground is that virtual ground is only a voltage reference
An ideal amplifier should have zero offset

Activity:Crossword Puzzle

Type
Crossword
Description

Operational Amplifier is also called as_________ OP AMP
The ratio of differential Gain to Common Mode gain is called _______ CMRR
Change in Offset Voltage wrt change in Power Supply Voltage is ______ PSRR
Maximum Rate of change of output voltage is ___________ Slew Rate
Range of frequency over which signals are equally amplified __________ Band Width
Average value of two input currents in OP Amp is _________ Bias Current
Difference of two input currents in OP AMP is _________ Offset Current
Voltage applied at the input to nullify the error voltage at output ____ Offset Voltage
Ideal value of __________ Resistance in OP AMP is Zero Output
Ideal Value of ________ resistance is infinity Input
Mode in which Phase, Frequency and Amplitude of Signals applied to 2 inputs Common
In the Block diagram of OP AMP ________ stage brings the DC level to Zero wrt ground Level Shift
When one of the terminal is grounded and signal is applied to other terminal is __________ Mode Single Ended
When two different signals(Out of phase) then mode is ___________ Differential

OPAMP & ITS APPLICATIONS Crossword

Type
Crossword
Description

A --------- is a part of OPAMP differential amplifier
In the ................... an identical signal appears in i/ps common mode
The common-mode gain is very low
The differential gain is very high
If Vin is 0, Vo is zero
The use of negative feedback ................. the voltage gain reduces
Negative feedback ................. the Zin and B.W increases
A voltage follower has .............. of 1 voltage gain
Op-amp can ........... both a.c. and d.c. amplify
The input offset current equals .............. between base currents difference
The tail current in a differential amplifier equals sum of two emitter currents two
A ............ signal is applied to both inputs common mode
The............. stage of an Op-amp is usually a differential amplifier input
.............. cannot flow to ground through a virtual ground Current
emitter-follower has ............... Zin and low Zo high

OPAMP Word Search

Type
Word Search
Description

virtual ground
Noninverting mode
Single ended
voltage buffer
slew rate
base current
Summation
Integration
Differentiation
Linear operations
offset
amplify
voltage gain
bandwidth
negative feedback
common mode
differential amplifier

Electricity Crossword

Type
Crossword
Description

a flow of electric charge Current
a form of energy resulting from the existence of charged particles Electricity
a force that acts at a distance due to a magnetic field Magnetism
a hindrance to the flow of a charge resistance
an electromotive force or potential difference expressed in volts Voltage
the difference of electrical potential between two points Potential Difference
is a characteristic of a unit of matter that expresses the extent to which it has more or fewer electrons than protons Charge
a stable subatomic particle that is found in atoms with a charge of negative electricity Electron
an atom or molecule with a net electric charge due to the loss or gain of one or more electrons Ion
A device used to transfer electrical energy from one circuit to another transformer
an electronic component that is designed to offer a desired amount of resistance to the flow Resistor
the complete path around which an electric current flows Circuit
a closed circuit in which the current divides into two or more paths before recombining to complete the circuit Parallel Circuit

Wire Welding Crossword

Type
Crossword
Description

A Charged atom is called: ion
a material that resists the flow of electricity insulator
Electrode negative straight
Changes AC to DC rectifier
Slip rings appear on: Alternator
Generator produces ____ current DC
AC wave shape sine
Constant voltage a.k.a potential
One way electrical valve Diode
Extreamly dangerous gas - clorinated solvents phosgene
Danger of Argon Asphyxiation
Not MIG but, GMAW
Reactive shielding Gas Carbon Dioxide
Inside a FCAW wire flux
Electrode Positive DCRP
Mode of Metal Trnasfer for MCAW Spray
Contact tip provides: electricity
Duty Cycle NEMA
Volt _____ curve amp
Wire feed speed IPM

ELECTRICITY Crossword

Type
Crossword
Description

___=IR VOLTAGE
Electricity flows between these CURRENT
The opposition to the flow of electric charges in a material RESISTANCE
SI unit:A and for short, "amp" AMPERE
Voltage unit VOLT
___ Law states a relationship between voltage, current, and resistance OHM
An electric current in which the flow of electric charge periodically reverses direction ALTERNATING CURRENT
An electric current in which the flow of electric charge stays flowing in the same direction DIRECT CURRENT
Series or Parallel CIRCUIT
Without this, a circuit would not work BATTERY
One turns lights on and off with this SWITCH
Conducts heat well CONDUCTOR
Does not conduct heat well INSULATOR
An electric circuit with only one path through which charge can flow SERIES CIRCUIT
An electric circuit with two or more paths through which charges can flow PARALLEL CIRCUIT
Positive or negative CHARGE
Unit of electric charge COULOMB
____=work/time POWER
A unit of energy equivalent to one kilowatt of power sustained for one hour KILOWATT HOUR
V=IR OHMS LAW
A form of energy resulting from existence of charged particles ELECTRICITY
Representation of elements using abstract symbols instead of realistic objects SCHEMATIC DIAGRAM

Shielded Metal Arc Welding Crossword

Type
Crossword
Description

SMAW ShieldedMetalArcWelding
A person who welds Weldor
The discharge of electricity through an air space Arc
A machine that produces current for welding ArcWelder
SMAW is also referred to as ArcWelding
SMAW is also referred to as StickWelding
SMAW uses flux-coated metal rods called Electrodes
Metal should always be cleaned with a WireBrush
The percentage of time that a welder can operate without overheating DutyCycle
Current that reverses its direction of flow frequently AlternatingCurrent
Flows in one direction only in accordance with how the welder is set DirectCurrent
A tool used to remove slag from a weld ChippingHammer
Should always be worn, even under your welding helmet SafetyGlasses
A = AMP
V = Voltage
W = Watt

Crossword Puzzle on Diodes and BJT

Type
Crossword
Description

This circuit is also called as limiter Clipper
Input waveform shifted in positive or negative direction Clamper
Converts AC to pulsating DC Rectifier
AC content in DC output Ripple
Used for voltage regulation Zener
Works on electroluminescence LED
Output is twice the peak value of input Doubler
Converts light energy to electric energy Photodiode
Current controlled device BJT
Voltage controlled device MOSFET
Heavily doped region of BJT Emitter
BJT region having largest area Collector
BJT acts as ON switch in __________region Saturation
BJT acts as OPEN switch in _____________ region Cutoff
_____________terminal of MOSFET is similar to emitter in BJT Source
_____________terminal of MOSFET is similar to collector in BJT Drain
Voltage gain is less than 1 in ___ configuration CC
Both the voltage gain and current gain are greater than 1 in___ configuration CE

Electromagnetism Crossword Puzzle

Type
Crossword
Description

two opposite end, called poles polarized
create the electromagnetic waves that propagate through the air ANTENNA
a specific wave length in the radio part of the electromagnetic spectrum CARRIERWAVE
a poor conductor of electric current whose electric charges partially align with an electric field DIELECTRIC
a group of neighboring atoms whose poles are aligned DOMAIN
generated in any piece of metal moving through a magnetic field; the magnetic they produce opposes the motion that caused the currents EDDYCURRENTS
converts mechanical energy to electrical energy ELECTRICGENERATOR
a magnet whose magnetic field is produced by electric current ELECTROMAGNET
the process of generating current through a wire in a circuit in a changing magnetic field ELECTROMAGNETICINDUCTION
oscillating electric and magnetic fields that propagate through space and matter ELECTROMAGNETICWAVES
a device used to measure very small currents GALVANOMETER
each form of the same atom that has the same chemical properties but a different mass ISOPTOPE
magnetic field produced by the induced current is in the direction that is opposite the original field LENZSLAW
exists in a space where magnets would experience a force MAGNETICFIELD
number of magnetic passing through a surface perpendicular to the lines MAGNETICFLUX
an instrument that measures the charge-to-mass ratio of positive ions within a material MASSSPECTROMETER
wire connected to a circuit and coiled into many spiral loops SOLENOID
secondary potential difference is smaller than primary potential difference STEPDOWNTRANSFORMER
secondary potential difference is larger than primary potential difference STEPUPTRANSFORMER
device that converts voice, music, pictures, or data to electronic signals, amplifies signals, and then sends the signal to an antenna TRANSMITTER
device that increases or decrease potential differences with relatively little waste of energy TRANSFORMERS

067-E105 Semiconductors Crossword

Type
Crossword
Description

Works like a switch while having no moving parts. Solid state
The electrons farthest away from the nucleus valence
Materials with conductivity that is better than insulators but poorer than conductors. semiconductors
Element: Si Silicon
Element: Ge germanium
Element: Ga gallium
Element: As Arsenic
Pure semiconductor material. Intrinsic
Adding impurity to semiconductor material doping
Like 22-across; 3 electrons on the outside. trivalent
Like 30-across; 5 electrons on the outside. pentavalent
Where N and P meet. Junction
A voltage wall that must be overcome to move forward. barrier
A device like a one-way street for electrons. Diode
Too much voltage in the wrong direction. breakdown
Cutoff circuits; hair trimmers; a basketball team clippers
Circuit for AC to DC Rectifier
It's a diode made to work in breakdown. Zener
Not a needle, but a type of diode. pin
There's negative resistance inside this diode. No light at the end of it. Tunnel
This device has seen the light. photodiode
This device shines. Not bad for three letters. LED
A doctor once asked for sharks equipped with these devices. lasers
It's the T in "BJT" transistor
When no current flows in a transistor, it's in this mode. cutoff
When too much current flows in a transistor, it's in this mode. saturation
Gain, after Greek A. beta
When semiconductors can't handle the heat, they ______. runaway
A small signal here on a BJT can have a big effect. Base
On a BJT, where the arrow is. emitter
These are controlled by voltage, not current. FETS
A whole family of triggers and switches. thyristors