Description : A transformer is a device for (a) stepping up (or down) DC voltage (b) generating electricity (c) stepping up (or down) AC voltage (d) converting AC into DC
Last Answer : Ans:(c)
Description : If output voltage is greater than input voltage, then transformer is A. step up B. step down C. faulty D. fatal
Last Answer : step up
Description : What characteristic is determined by the time required for a voltage wave to travel from the input end of an artificial transmission line to the output end and back again?
Last Answer : Pulse width
Last Answer : Pulse width.
Description : What purpose does flux serve in the soldering process?
Last Answer : It cleans the metal by removing the oxide layer and prevents further oxidation during the soldering
Description : Horn radiators serve what purpose other than being directional radiators?
Last Answer : Waveguide impedance matching devices.
Description : The numbers and letters on ICs and schematics serve what purpose?
Last Answer : Identify the type of IC.
Description : What purpose do masks serve?
Last Answer : Control patterns of materials on substrates.
Description : It is more difficult to obtain good results while measuring horizontal distance by stepping (A) Up-hill (B) Down-hill (C) In low undulations (D) In plane areas
Last Answer : (A) Up-hill
Description : What do you think of Governor Andrew Cuomo stepping down?
Last Answer : Good. (I wonder if conservatives will call this “cancel culture”... nah)
Description : Steve Jobs stepping down as CEO until June. Opinions?
Last Answer : You have some kind of official source for this? I can’t find any confirmation of it, either on the official Apple site or on any of the Apple rumor sites.
Description : What would be the output of a negative clamper with a bias potential of −5 volts and an input voltage swing from +50 to −50 volts?
Last Answer : -5 volts.
Description : In the inverting configuration, what is the voltage (for all practical purposes) at the inverting input to the operational amplifier if the input signal is a 1-volt, peak-to-peak sine wave?
Last Answer : 0 volts.
Description : A, when there is an increase in the input voltage, the forward bias of Q1 increases/decreases (which one).
Last Answer : Increases.
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.
Description : When the input and output wipers of a balanced potentiometer are in the same angular position, what is the value of the error voltage?
Last Answer : Zero.
Description : If the inductance of a choke-input filter is increased, will the output ripple voltage amplitude (Er) increase or decrease?
Last Answer : Decrease.
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.
Description : What are three advantages of adding an ac bias voltage to the input signal instead of adding a fixed dc bias voltage?
Last Answer : a. Reproduces a stronger output signal. b. Greatly improves the SNR. c. Greatly reduces the natural tape hiss.
Description : Why does adding dc vice ac bias voltage to the input signal result in a poor signal-to-noise ratio (SNR)?
Last Answer : With dc bias, the SNR is poor because only a small portion of the magnetism curve is straight enough to use, thus the output signal is weak compared with the natural tape hiss.
Description : The leads to the primary and the high-voltage secondary windings of a power transformer usually are of what color?
Last Answer : Primary leads-black; secondary leads red.
Description : What causes a voltage to be developed across the secondary winding of a transformer?
Last Answer : The magnetic lines generated by the current in the primary cut
Description : For what are the low voltage windings in a transformer used?
Last Answer : Filament voltage to the electron tubes.
Description : A load with an impedance of 440 ohms is connected across the secondary of the transformer illustrated. If the input voltage is 110 VAC and the step-up ratio is 10 to 1, what will be the primary current? EL-0055 A. 2.5 amps B. 25 amps C. 250 amps D. current cannot be determined with information given
Last Answer : Answer: B
Description : A load is connected to the secondary of the transformer illustrated and the current through the load is 10 amps. If the step-up ratio is 10 to 1 and the input voltage is 110 VAC, what will be the current flow through the primary? EL-0055 A. 1 amp B. 10 amps C. 100 amps D. 1000 amps
Last Answer : Answer: C
Description : The voltage at the reference electrode of the circuit shown in the illustration is applied to the input of a/an ______________. EL-0090 A. class A detector whose output drives an ... drives an 2-stage isolation transformer D. magnetic amplifier whose output controls a saturable reactor
Last Answer : Answer: D
Description : The complement system consists of a series of serum proteins that exist in a quiescent or very low-level state of activation in the uninfected host. Which of the following ... certain complement components serve as chemoattractants to additional cellular components of the host defense mechanism
Last Answer : Answer: a, c, d Complement activation can occur through either classic or alternate (properdin) pathways, both of which eventuate in deposition of terminal complement pathway components on the ... and release of lysosomal enzymes that can directly damage certain target tissues, such as the lung
Description : Which of the following devices will receive voltage surge first travelling on the transmission line ? (a) Lightning arresters (b) Relays (c) Step-down transformer (d) Switchgear
Last Answer : (a) Lightning arresters
Description : When a low input voltage is imparted to a device which then delivers a high output voltage, the device is known as a _____________. A. primary transformer B. secondary transformer C. stepdown transformer D. stepup transformer
Description : In the illustrated circuit, if the input to leads 'B' and 'Y' was 24 VDC the output between 'A' and 'X' will be _________. EL-0069 A. 24 VDC B. 22.8 VDC, 24 VDC minus the 1.2 VDC voltage drop across two diodes C. undeterminable without knowing the turns ratio of the transformer D. 0 VDC
Description : If the frequency of input voltage of a transformer is increased keeping the magnitude of voltage unchanged, then: A) both hysteresis loss and eddy current loss in the core will increase B) ... current loss will increase D) hysteresis loss will decrease but eddy current loss will remain unchanged
Last Answer : If the frequency of input voltage of a transformer is increased keeping the magnitude of voltage unchanged, then: hysteresis loss will decrease but eddy current loss will remain unchanged
Description : Does 1:5 indicate a step-up or step-down transformer?
Last Answer : Step up.
Last Answer : Step up
Description : When shipboard electrical distribution circuits are connected in parallel, additional parallel circuits will cause the total circuit resistance to _____________. A. increase, causing a drop in the line current B ... an increase in the line voltage D. decrease, causing an increase in the line current
Description : The addition to total cost by producing an additional unit of out-put by a firm is called - (1) Variable cost (2) Average cost (3) Marginal cost (4) Opportunity cost
Last Answer : (3) Marginal cost Explanation: The addition to total cost by producing an additional unit of output by a firm is called Marginal cost. Average cost is the total cost of producing a given output divided by that output.
Description : The setting and hardening of cement after addition of water is due to a) Binding action of water b) Evaporation of water c) Hydration and hydrolysis of some constituent compounds of cement* d) Additional hardening compounds added to cement
Last Answer : c) Hydration and hydrolysis of some constituent compounds of cement*
Description : In an agricultural family all the family members are working the farmland of the family. Due to addition of two more person in the family they are also working in the farmland of the ... (a) Cyclical unemployment ; (b) Disguised unemployment ; (c) Frictional unemployment (d) Seasonal unemployment
Last Answer : (b) Disguised unemployment ;
Description : Marginal cost is defined as……………………. (a) Change in total cost due to addition of one unit ; (b) Total cost divided by additional unit; (c) Total cost divided by total units produced ; (d) Total sales / Total production
Last Answer : (a) Change in total cost due to addition of one unit ;
Description : In addition to three Central problem of economy, the additional problem(s) raised by the Modern economists is / are (a) Are the resources fully utilized or not ; (b) How efficient is the production and ... (c) Whether the capacity to produce or grow is increasing or is static ; (d) All the three
Last Answer : (d) All the three
Description : The addition to total cost by producing an additional unit of output by a firm is called (1) Variable cost (2) Average cost (3) Marginal cost (4) Opportunity cost
Last Answer : Marginal cost
Description : What is the purpose of "stickoff voltage"?
Last Answer : It is used in synchro systems to prevent false synchronizations.
Description : The purpose of a voltage regulator is to provide an output voltage with little or no __
Last Answer : Variation.
Description : The purpose of a voltage regulator is to provide an output voltage with little or no _
Description : In step down transformer, the AC output gives the current _________ than the input current.
Last Answer : more
Description : What is correct Sisters Stepping Up or is it Sisters' Stepping Up?
Last Answer : It's sisters stepping up. Only if the sisters owned stepping up would it be possessive.
Description : Hello, does the gas bladder in fish also serve to keep the body in balance in addition to buoyancy? Please, give me an advice.
Last Answer : I think so.
Description : Circuits that can be interconnected without additional circuitry are known as ____________ circuits.
Last Answer : Compatible.
Description : What type of magnetic tape is used to record computer programs and data, and what are the additional thickness and quality standards for this type of tape?
Last Answer : digital magnetic tape is for computer programs and data. Its base material is about 50% thicker. The tape’s surface must not have blemishes or coating flaws because losing even one digital data bit could ruin the recorded computer program or data.
Description : Cartridge hard disk drives with 14" disk packs may require what additional types of preventive maintenance?
Last Answer : a. Cleaning with a special cleaning disk. b. Cleaning air filters. c. Cleaning spindles, rails, and slides. d. Cleaning and buffing read/write heads.
Description : Is "biobreak" the new "stepping out for a moment"?
Last Answer : This is the first I’ve heard of “biobreak”. Then again, Percy is a new one for me too.