The device used to change the speed of an electric fan is (1) Amplifier (2) Regulator (3) Switch (4) Rectifier

The device used to change the speed of an electric fan is (1) Amplifier (2) Regulator (3) Switch (4) Rectifier
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Regulator
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The device used to change the speed of an electric fan is – (1) Amplifier (2) Regulator (3) Switch (4) Rectifier

Description : The device used to change the speed of an electric fan is – (1) Amplifier (2) Regulator (3) Switch (4) Rectifier

Last Answer : (2) Regulator Explanation: A voltage regulator is designed to automatically maintain a constant voltage level. A voltage regulator maybe a simple "feedforward" design or may include negative feedback ... power supplies where they stabilize the DC voltages used by the processor and other elements.

The device used to change the speed of an electric fan is - (1) Amplifier (2) Regulator (3) Switclh (4) Rectifier

Description : The device used to change the speed of an electric fan is - (1) Amplifier (2) Regulator (3) Switclh (4) Rectifier

Last Answer : (2) Regulator Explanation: Regulator is to adjust the voltage across the motor of the fan.

The device which converts AC to DC is (1) Oscillator (2) Amplifier (3) Rectifier (4) None of these

Description : The device which converts AC to DC is (1) Oscillator (2) Amplifier (3) Rectifier (4) None of these

Last Answer : (3) Rectifier Explanation: A rectifier is an electrical device that converts alternating current (AC). which periodically reverses direction, to direct current (DC), which flows in only one ... serving as components of DC power supplies and high-voltage direct current power transmission systems.

The device which converts AC to DC is (1) Oscillator (2) Amplifier (3) Rectifier (4) None of these

Description : The device which converts AC to DC is (1) Oscillator (2) Amplifier (3) Rectifier (4) None of these

Last Answer : Rectifier

The illustrated device is a _______. EL-0064 A. full wave bridge rectifier B. half wave bridge rectifier C. solid state voltage regulator D. direct current (DC) filter

Description : The illustrated device is a _______. EL-0064 A. full wave bridge rectifier B. half wave bridge rectifier C. solid state voltage regulator D. direct current (DC) filter

Last Answer : Answer: A

When two semiconductors of p-and ntype are brought in contact, they form p-n junction which acts like a/an – (1) Conductor (2) Oscillator (3) Rectifier (4) Amplifier

Description : When two semiconductors of p-and ntype are brought in contact, they form p-n junction which acts like a/an – (1) Conductor (2) Oscillator (3) Rectifier (4) Amplifier

Last Answer : (3) Rectifier Explanation: P-n junction is a device which flows current in one direction when it is forward biased and when it is reverse biased it doesn't flow any current through it. So it ... (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction.

When two semiconductors of pand n-type are brought in contact, they form p-n junction which acts like a/an (1) Conductor (2) Oscillator (3) Rectifier (4) Amplifier

Description : When two semiconductors of pand n-type are brought in contact, they form p-n junction which acts like a/an (1) Conductor (2) Oscillator (3) Rectifier (4) Amplifier

Last Answer : Rectifier

Regarding an AC generator connected to the main electrical bus; as the electric load and power factor vary, a corresponding change is reflected in the generator armature reaction. These changes in armature reaction are compensated for by the __________ A. governor speed droop setting B. voltage regulator C. balance coil D. phase-balance relay

Description : Regarding an AC generator connected to the main electrical bus; as the electric load and power factor vary, a corresponding change is reflected in the generator armature reaction. These changes in ... . governor speed droop setting B. voltage regulator C. balance coil D. phase-balance relay

Last Answer : Answer: B

Section II of the circuit shown in the illustration is the ____________. EL-0085 A. voltage regulator B. filter C. rectifier D. voltage transformer

Description : Section II of the circuit shown in the illustration is the ____________. EL-0085 A. voltage regulator B. filter C. rectifier D. voltage transformer

Last Answer : Answer: C

Section IV of the circuit shown in the illustration is the _____________. EL-0085 A. voltage regulator B. filter C. rectifier D. voltage transformer

Description : Section IV of the circuit shown in the illustration is the _____________. EL-0085 A. voltage regulator B. filter C. rectifier D. voltage transformer

Last Answer : Answer: A

Section III of the circuit shown in the illustration is a _____________. EL-0085 A. voltage regulator B. filter C. rectifier D. voltage transformer

Description : Section III of the circuit shown in the illustration is a _____________. EL-0085 A. voltage regulator B. filter C. rectifier D. voltage transformer

Last Answer : Answer: B

how regulator of ceiling fan works?

Last Answer : It is simply variable resistance create opposition to flow of current and decrease or increase the speed of fan

The voltage regulation in magnetic amplifier type voltage regulator is effected by?

Last Answer : The voltage regulation in magnetic amplifier type voltage regulator is effected by varying the reactance.

Why would my multi-speed fan switch operate at reverse strength?

Description : Why would my multi-speed fan switch operate at reverse strength?

Last Answer : Perhaps in the strange fashion of fans the speed directly after off is the highest, then the rest are respectively slower. And they simply numbered them 0–4 for aesthetic purposes?

What is the name of the device used to convert alternating cur-rent into direct current? (1) Amreter (2) Galvanometer (3) Rectifier (4) Transformer

Description : What is the name of the device used to convert alternating cur-rent into direct current? (1) Amreter (2) Galvanometer (3) Rectifier (4) Transformer

Last Answer : (3) Rectifier Explanation: A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction. The process is known as rectification.

A device used for converting A.C. into D.C. is called – (1) Transformer (2) Rectifier (3) Induction coil (4) Dynamo

Description : A device used for converting A.C. into D.C. is called – (1) Transformer (2) Rectifier (3) Induction coil (4) Dynamo

Last Answer : (2) Rectifier Explanation: A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in ... -arc valves, solidstate diodes, silicon-controlled rectifiers and other silicon-based semiconductor switches.

What is the name of the device used to convert alternating current into direct current ? (1) Ammeter (2) Galvanometer (3) Rectifier (4) Transformer

Description : What is the name of the device used to convert alternating current into direct current ? (1) Ammeter (2) Galvanometer (3) Rectifier (4) Transformer

Last Answer : Rectifier

Instrument used to change the speed of Electric fan –

Description : Instrument used to change the speed of Electric fan –

Last Answer : Regulator

When paralleling two AC generators, the frequency of the incoming machine immediately prior to closing its breaker should be ____________. A. controlled by placing the governor switch in the automatic position B. adjusted with the voltage regulator C. slightly greater than the bus frequency D. slightly less than the bus frequency

Description : When paralleling two AC generators, the frequency of the incoming machine immediately prior to closing its breaker should be ____________. A. controlled by placing the governor switch in the automatic ... regulator C. slightly greater than the bus frequency D. slightly less than the bus frequency

Last Answer : Answer: C

The frequency of an alternator is controlled from the main switchboard by adjusting the _____________. A. frequency meter B. voltage regulator C. governor control D. sychroscope switch

Description : The frequency of an alternator is controlled from the main switchboard by adjusting the _____________. A. frequency meter B. voltage regulator C. governor control D. sychroscope switch

Last Answer : Answer: C

Equal power factors on paralleled AC generators are maintained by an automatic _____________. A. voltage regulator B. reverse power relay C. reverse current relay D. governor control switch

Description : Equal power factors on paralleled AC generators are maintained by an automatic _____________. A. voltage regulator B. reverse power relay C. reverse current relay D. governor control switch

Last Answer : Answer: A

When securing an AC generator, you should FIRST ___________. A. open the generator circuit breaker B. switch the voltage regulator to 'manual' C. decrease the field excitation to minimum D. reduce the load on the unit

Description : When securing an AC generator, you should FIRST ___________. A. open the generator circuit breaker B. switch the voltage regulator to 'manual' C. decrease the field excitation to minimum D. reduce the load on the unit

Last Answer : Answer: D

Prior to starting an AC generator prime mover, the voltage regulator cutout switch should be placed in the __________. A. manual position B. bus neutral position C. raise voltage position D. transfer position

Description : Prior to starting an AC generator prime mover, the voltage regulator cutout switch should be placed in the __________. A. manual position B. bus neutral position C. raise voltage position D. transfer position

Last Answer : Answer: A

What can be used to replace the exciter in the circuit shown in the illustration? EL-0101 A. A step-up transformer. B. A rectifier. C. A step-down transformer. D. An operational amplifier.

Description : What can be used to replace the exciter in the circuit shown in the illustration? EL-0101 A. A step-up transformer. B. A rectifier. C. A step-down transformer. D. An operational amplifier.

Last Answer : Answer: B

The schematic diagram shown in the illustration represents which of the listed solid-state circuits? EL-0069 A. Bridge rectifier B. Magnetic amplifier C. Flip-flop generator D. Cathodic amplifier

Description : The schematic diagram shown in the illustration represents which of the listed solid-state circuits? EL-0069 A. Bridge rectifier B. Magnetic amplifier C. Flip-flop generator D. Cathodic amplifier

Last Answer : Answer: A

Basically, a magnetic amplifier is a saturable reactor with the addition of _____________. A. AC to the bias winding B. variable capacitance to all windings C. eddy current protectors D. a rectifier in the load circuit

Description : Basically, a magnetic amplifier is a saturable reactor with the addition of _____________. A. AC to the bias winding B. variable capacitance to all windings C. eddy current protectors D. a rectifier in the load circuit

Last Answer : Answer: D

What do you call the single booster installed on the antenna dish of satellite receiver? A. Low noise amplifier B. Single amplifier C. Noise amplifier D. Rectifier

Description : What do you call the single booster installed on the antenna dish of satellite receiver? A. Low noise amplifier B. Single amplifier C. Noise amplifier D. Rectifier

Last Answer : A. Low noise amplifier

What is the purpose of the rectifier in a magnetic amplifier?

Description : What is the purpose of the rectifier in a magnetic amplifier?

Last Answer : The rectifier eliminates hysteresis loss.

P-N junction is (A) a rectifier. (B) an amplifier. (C) an Oscillator. (D) a Coupler.

Description : P-N junction is (A) a rectifier. (B) an amplifier. (C) an Oscillator. (D) a Coupler.

Last Answer : (A) a rectifier.

Positive feedback is used in 1. Amplifier 2. Rectifier 3.Oscillator 4. Detector

Description : Positive feedback is used in 1. Amplifier 2. Rectifier 3.Oscillator 4. Detector 

Last Answer : Positive feedback is used in 1. Amplifier 2. Rectifier 3.Oscillator 4. Detector 

A device used in an electrical circuit to change alternating current to direct current, is known as a _____________. A. current transformer B. rectifier C. condenser D. shunt

Description : A device used in an electrical circuit to change alternating current to direct current, is known as a _____________. A. current transformer B. rectifier C. condenser D. shunt

Last Answer : Answer: B

A silicon controlled rectifier (SCR) is a solid state device used to change ________________. A. DC to AC and control relatively low load current B. AC to DC and control relatively high load current C. DC to AC and control relatively high load current D. AC to DC and control relatively low load current

Description : A silicon controlled rectifier (SCR) is a solid state device used to change ________________. A. DC to AC and control relatively low load current B. AC to DC and control relatively high load ... to AC and control relatively high load current D. AC to DC and control relatively low load current

Last Answer : Answer: B

The device which converts sound energy into electrical enemy is called – (1) Amplifier (2) Speaker (3) Microphone (4) Transmitter

Description : The device which converts sound energy into electrical enemy is called – (1) Amplifier (2) Speaker (3) Microphone (4) Transmitter

Last Answer : (3) Microphone Explanation: A microphone converts sound energy to electrical energy this energy level is used as an output using same energy level, amplified or it could be used to record those ... coil within a strong magnetic field. The induced current duplicates the frequency of the sound wave.

The device which converts sound energy into electrical energy is called (1) Amplifier (2) Speaker (3) Microphone (4) Transmitter

Description : The device which converts sound energy into electrical energy is called (1) Amplifier (2) Speaker (3) Microphone (4) Transmitter

Last Answer : Microphone

A fuse will 'blow' if _____________. A. an electric motor is stopped suddenly by opening a switch B. the flow of current to the protection device is reversed C. the electrical current exceeds the rated value of the fuse D. unequal resistors are connected in parallel

Description : A fuse will 'blow' if _____________. A. an electric motor is stopped suddenly by opening a switch B. the flow of current to the protection device is reversed C. the electrical current exceeds the rated value of the fuse D. unequal resistors are connected in parallel

Last Answer : Answer: C

What device in a waveguide system used for stopping or diverting electromagnetic wave as desired? A. Mechanical switch B. Electric switch C. Push-button switch D. Waveguide switch

Description : What device in a waveguide system used for stopping or diverting electromagnetic wave as desired? A. Mechanical switch B. Electric switch C. Push-button switch D. Waveguide switch

Last Answer : D. Waveguide switch

Why does the electric fan always turn to the left ?

Description : Why does the electric fan always turn to the left ?

Last Answer : If desired, the fan can be rotated to the right by reversing the connection to the capacitor , this way the wind will flow backwards or upwards instead of downwards or forwards (the fans are placed in such a curved manner). So the fan always turns to the left as the wind blows in the user's head.

The device labeled 'REG SW' in the illustration is used to ___________. EL-0003 A. shift from the automatic voltage regulator to the manual voltage regulator B. shift the governor control from manual to automatic/zero droop C. enable the operator to read the field voltage on device 'REG ADJ' or device 'MAN ADJ' D. supply regulated control power to the switchboard

Description : The device labeled 'REG SW' in the illustration is used to ___________. EL-0003 A. shift from the automatic voltage regulator to the manual voltage regulator B. shift the governor control from manual to ... device 'REG ADJ' or device 'MAN ADJ' D. supply regulated control power to the switchboard

Last Answer : Answer: A

Device to control the pressure of fluid and gases within range of settings. a. Relief valve. c. Filter b. Spray gun. d. Pressure regulator

Description : Device to control the pressure of fluid and gases within range of settings. a. Relief valve. c. Filter b. Spray gun. d. Pressure regulator

Last Answer : Pressure regulator

When a series voltage regulator is used to control output voltages, any increase in the input voltage results in an increase/a decrease (which one) in the resistance of the regulating device.

Description : When a series voltage regulator is used to control output voltages, any increase in the input voltage results in an increase/a decrease (which one) in the resistance of the regulating device.

Last Answer : An increase.

When a series voltage regulator is used to control output voltages, any increase in the input voltage results in an increase/a decrease in the resistance of the regulating device.

Description : When a series voltage regulator is used to control output voltages, any increase in the input voltage results in an increase/a decrease in the resistance of the regulating device.

Last Answer : Increase.

The device used for voltage regulator is

Description : The device used for voltage regulator is

Last Answer : The device used for voltage regulator is zener diode

I can't figure out how to wire the thermostat, transformer, fan/limit switch, and an electrical cut off (to pilot light) in my 1945 Armstrong Furnace. Help!

Description : I can't figure out how to wire the thermostat, transformer, fan/limit switch, and an electrical cut off (to pilot light) in my 1945 Armstrong Furnace. Help!

Last Answer : You may wish to talk to an electrical contractor, if you need to be up to code. Where I live, it would not be legal for the layman to do this kind of work. Your laws may vary, but it’s worth checking them out.

Can I get my ceiling fan to turn on and off by using the light switch?

Description : Can I get my ceiling fan to turn on and off by using the light switch?

Last Answer : Yes. Simply turn on the ceiling fan while the light switch is in the "on" position. Adjust the spinning to the level of your choice. Now the fan will turn on and off when you switch the light on and off.

In the illustration if the compressor fails to start but the condenser fan motor is running the problem is _______. EL-0042 A. no power between L1 and L2 B. the yellow wire is open at the freezer temperature control switch C. the overload is open D. the blue wire from the defrost heater is open

Description : In the illustration if the compressor fails to start but the condenser fan motor is running the problem is _______. EL-0042 A. no power between L1 and L2 B. the yellow wire is open at the freezer temperature control switch C. the overload is open D. the blue wire from the defrost heater is open

Last Answer : Answer: C

In the illustration if the compressor fails to start but the condenser fan motor is running the problem is _______. EL-0043 A. no power between L1 and L2 B. the yellow wire is open at the freezer temperature control switch C. the overload is open D. the blue wire from the defrost heater is open

Description : In the illustration if the compressor fails to start but the condenser fan motor is running the problem is _______. EL-0043 A. no power between L1 and L2 B. the yellow wire is open at the freezer temperature control switch C. the overload is open D. the blue wire from the defrost heater is open

Last Answer : Answer: C

The purpose of vacuum tube was to NOT act like A) an amplifier B) a switch C) a router D) None of above

Description : The purpose of vacuum tube was to NOT act like A) an amplifier B) a switch C) a router D) None of above

Last Answer : Answer : C

The circuit which changes input signal at output with phase shift of 1800 is called (a) Amplifier (b) operational amplifier (c) switch (d) inverter

Description : The circuit which changes input signal at output with phase shift of 1800 is called (a) Amplifier (b) operational amplifier (c) switch (d) inverter

Last Answer : (d) inverter

Explain the operation of transistor as a switch and as an amplifier, with neat circuit diagrams.

Description : Explain the operation of transistor as a switch and as an amplifier, with neat circuit diagrams. 

Last Answer : Explanation of transistor as a switch: The transistor can be used for two types of application viz. amplification and switching. For the amplification, transistor is biased in its active region. ... results in a large output voltage, which shows that the transistor works as an amplifier.

A full-wave rectifier has one diode burned out in an open condition, what will be the output characteristic of the device? A. Zero B. Half-wave rectified C. Full-wave rectified D. Equal to the AC input

Description : A full-wave rectifier has one diode burned out in an open condition, what will be the output characteristic of the device? A. Zero B. Half-wave rectified C. Full-wave rectified D. Equal to the AC input

Last Answer : Answer: B