Description : Which of the following statements is true regarding the illustrated circuit? El-0069 A. This full wave bridge should never be used aboard ship because the ground on lead 'A' will show on ... be direct current suitable for electronic circuits requiring voltage regulation. D. All the above are true.
Last Answer : Answer: B
Description : n electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a – (1) Power transmittor (2) Battery (3) Uninterrupted power supply (UPS) (4) Generator
Last Answer : (3) Uninterrupted power supply (UPS) Explanation: A Galvanic cell, also known as battery, is an electro-chemical cell that derives electrical energy from spontaneous redox reactions taking place within ... produce direct current. A battery is a set of galvanic cells that are connected in parallel.
Description : An electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a : (1) Power transmittor (2) Battery (3) Uninterrupted power supply (UPS) (4) Generator
Last Answer : Battery
Description : Constant voltage transmission entails the following disadvantage (a) large conductor area is required for same power transmission (b) short-circuit current of the system is increased (c) either of the above (d) none of the above
Last Answer : (b) short-circuit current of the system is increased
Description : A disadvantage of using the configuration in the illustrated circuit is _________. EL-0045 A. no current gain B. high input resistance C. high voltage gain D. becomes unstable with an increase of ambient temperature
Last Answer : Answer: A
Description : How does the supply voltage affect the accuracy of Wheatstone bridge measurements?
Last Answer : As the supply voltage increases, bridge components may heat up and become less accurate.
Description : If the load requirement consists of both positive and negative voltages, what technique is used in the voltage divider to supply the loads from a single voltage source?
Last Answer : The ground (reference point) is placed in the proper point in the voltage divider so that positive and negative voltages are supplied
Description : What is the disadvantage of using a double receiver instead of two individual receivers?
Last Answer : If one of the receivers goes bad the entire unit must be replaced.
Description : What is the main disadvantage of parallel transfer?
Last Answer : Requires more circuitry.
Description : What is the main disadvantage of a conventional full-wave rectifier?
Last Answer : Peak voltage is half that of the half-wave rectifier.
Description : Name a disadvantage of sine-wave oscillator synchronizers.
Last Answer : It requires additional shaping circuits.
Last Answer : . It requires additional shaping circuits.
Description : What is the main disadvantage of the conventional full wave rectifier?
Last Answer : The peak voltage is half that of a half-wave rectifier.
Description : What is the major disadvantage of printed circuit boards?
Last Answer : Components soldered in place.
Description : What is the major disadvantage of an fm signal as compared to an AM signal?
Last Answer : Wide bandpass.
Description : What is a disadvantage of agc?
Last Answer : Weak signals produce bias, which could result in no usable receiver output.
Description : What is the main disadvantage of PROM?
Last Answer : If a mistake is made and entered, it cannot be corrected or erased.
Description : How is the disadvantage of the Gramme-ring armature overcome in the drum-wound armature?
Last Answer : By winding the armature in a way that places the entire coil where it is exposed to maximum flux.
Description : What is the main disadvantage of a series motor?
Last Answer : It must have a load connected to avoid damage from excess speed.
Description : What is the main disadvantage of series generators?
Last Answer : Output voltage varies as the load varies
Description : What is the main disadvantage of using fiber-optic cables?
Last Answer : High attenuation.
Description : What is the primary disadvantage of the pointer arrangement for indicating coil rotation?
Last Answer : Coil balance.
Description : What is the main disadvantage of the rhombic antenna?
Last Answer : It requires a large antenna site.
Description : What is the main disadvantage of pulse-position modulation?
Last Answer : It requires synchronization between the transmitter and receiver.
Description : What is a major disadvantage of a carbon microphone?
Last Answer : Background hiss resulting from random changes in the resistance between individual carbon granules.
Last Answer : Antenna-to-ground capacitance can cause the oscillator frequency to vary.
Description : Advantage and disadvantage of direct rule?
Last Answer : It helped colonialists gain man power
Description : Give five disadvantage of direct rules?
Last Answer : take four arguments, as in "Pat1 sold Chris2 a lawnmower3 for $204" or "Chris1 paid Pat2 $203 for a lawnmower4"
Description : What is the disadvantage of direct immuno fluorescence ?
Last Answer : A separate fluorescent conjugate have to be prepared against each antigen to be tested.
Description : The direct shear test suffers from the following disadvantage: (A) Drain condition cannot be controlled (B) Pore water pressure cannot be measured (C) Shear stress on the failure plane is not uniform (D) The area under the shear and vertical loads does not remain constant throughout the test
Last Answer : Answer: Option C
Description : direct shear test possesses the following disadvantage: (A) A relatively thin thickness of sample permits quick drainage (B) A relatively thin thickness of sample permits quick dissipation of pore pressure ... C) As the test progresses the area under shear, gradually changes (D) None of these
Description : List any two direct methods of level measurement. Explain Hydrostatic method of level measurement. Give one advantage and one disadvantage of it.
Last Answer : ➢ Direct methods of level measurement Direct methods 1. Hook type 2. Sight glass type 3. Float type 4. Dip stick ➢ Hydrostatic method of level measurement. ➢ A liquid in ... - 1. Their calibration gets changed according to variations in product density. 2. Require compressed air.
Description : What is the device called that will separate alternating current from direct current, or that will separate alternating current of one frequency from other alternating currents of different frequencies?
Last Answer : A filter.
Description : What effect does inductance have (a) on steady direct current and (b) on direct current while it is changing in amplitude?
Last Answer : a) No effect. (b) Inductance opposes any change in the amplitude of current.
Description : Define direct current.
Last Answer : An electrical current which flows in one direction only.
Description : The disadvantage of voltage divider bias is that 1. it has a high stability factor 2. it has many resistors 3. it allows thermal runaway 4. it does not allow faithful amplification
Last Answer : Is the power off this word only current
Description : A DC generator is used to supply direct current in order to maintain an AC generator field and is known as a/an _____________. A. rotor B. stator C. exciter D. armature
Last Answer : Answer: C
Description : What is the name of the device that provides an increase in current, voltage, or power of a signal without appreciably altering the original signal?
Last Answer : Amplifier.
Description : Which quantity (voltage or current) determines the intensity of an electrical shock?
Last Answer : Current.
Description : Circuits which maintain constant voltage or current outputs are called dc voltage or dc current ___.
Last Answer : Regulators.
Description : . A non-resonant line is a line that has no standing waves of current and voltage on it and is considered to be flat. Why is this true?
Last Answer : The load impedance of such a line is equal to Z0.
Description : How does transit time affect the relationship of the grid voltage and the plate current at high frequencies?
Last Answer : Transit time causes the grid voltage and plate current to be out of phase
Description : What is the relationship of current to voltage in a circuit?
Last Answer : current increases as voltage increases.
Description : Current leads voltage by 90° (ICE)
Last Answer : Current leads voltage by 90° (ICE)
Description : What is the phase relationship between current and voltage in an inductor?
Last Answer : Current lags voltage by 90° (ELI).
Description : how is (a) the current through R2 and (b) the voltage drop across R2 computed?
Last Answer : (a) By adding the bleeder current (IR1) and the current through load 1(b) By subtracting the voltage of load 1 from the voltage of load 2.
Description : If the source voltage for the voltage divider in question 50 supplies 150 volts, what is the total current through the voltage divider?
Last Answer : 495 mA.
Description : If a voltage divider is required for a load that will use 450 mA of current, what should be the value of bleeder current?
Last Answer : 45 mA rule-of-thumb.
Description : A series circuit consists of two resistors in series. R1 = 25 ohms and R2 = 30 ohms. The circuit current is 6 amps. What is the (a) source voltage, (b) voltage dropped by each resistor, (c) total power, and (d) power used by each resistor?
Last Answer : (a) 330 volts. (b) E1 = 150 volts. E2 = 180 volts. (c) 1.98 kilowatts. (d) P1 = 900 watts. P2 = 1.08 kilowatts component but in a parallel circuit total current divides among the available paths.