Description : Define the temperature coefficient of resistance.
Last Answer : The amount of increase in the resistance of a 1-ohm sample of the conductor per degree of temperature rise above 0º C
Description : Which temperature coefficient indicates a material whose resistance increases as temperature increases?
Last Answer : Positive.
Description : What type of temperature coefficient material does not produce increased heat in response to increased current flow?
Last Answer : Zero-temperature coefficient.
Description : When temperature rises, resistance of negative temperature coefficient thermistor A. increases B. decreases C. zero D. infinity
Last Answer : decreases
Description : Thermistor with high negative temperature coefficient are very accurate for measuring low temperature especially near is a. 10 K b. 70K c. 200K d. 35K
Last Answer : c. 200K
Description : Semi-conductors have ________ temperature coefficient of resistance. (A) Negative (B) Positive (C) Both positive and negative (D) None of the above
Last Answer : (A) Negative
Description : Which of the following has negative temperature coefficient? A. Brass B. Mercury C. Electrolytes D. Silver.
Last Answer : Electrolytes has negative temperature coefficient.
Description : Which amongst the following has a negative coefficient of temperature for resistance? a) Copper b) Lead c) Carbon d) Aluminium
Last Answer : Which amongst the following has a negative coefficient of temperature for resistance? Carbon
Description : What device is similar to an RTD but has a negative temperature coefficient? A) Strain gauge B) Thermistor C) Negative-type RTD D) Thermocouple
Last Answer : What device is similar to an RTD but has a negative temperature coefficients
Description : What effect does flux leakage in a transformer have on the coefficient of coupling (K) in the transformer?
Last Answer : it causes K to be less than unity (I).
Description : What is meant by the coefficient of coupling?
Last Answer : The ratio of the fines of force produced by one coil to the lines of force that link another coil. It is never greater than one.
Description : Will an optical fiber's attenuation coefficient vary with changes in wavelength?
Last Answer : Yes.
Description : Is it possible for a coefficient of variation to be negative Explain.?
Last Answer : Of course it is! If the mean of a set of data is negative, thenthe coefficient of variation will be negative.
Description : . Non-negativity condition in an LP model implies a. A positive coefficient of variables in objective function b. A positive coefficient of variables in any constraint c. Non-negative value of resources d. None of the above
Last Answer : d. None of the Above
Description : Define the term "torque."
Last Answer : A measure of how much load a machine can turn.
Description : a. Define the term "working voltage" of a capacitor. b. What should be the working voltage of a capacitor in a circuit that is operating at 600 volts?
Last Answer : a. It is the maximum voltage the capacitor can work without risk of damage. b. 900 volts.
Description : Define the term "farad."
Last Answer : A farad is the unit of capacitance. A capacitor has a capacitance of 1 farad when a difference of 1 volt will charge it with 1 coulomb of electrons.
Description : How is the term "temperature inversion" used when referring to radio waves?
Last Answer : It is a condition where layers of warm air are formed above layers of cool air.
Description : What term is used to describe a situation in which atmospheric temperature first increases with altitude and then begins to decrease?
Last Answer : Temperature inversion.
Description : What term describes a material whose resistance remains relatively constant with changes in temperature?
Last Answer : Zero temperature coefficient.
Description : If a voltage (positive or negative) is measured on the "1" output of a flip-flop, what state is it in?
Last Answer : SET state.
Description : What type of bias (positive or negative) is added to a negative damper for the most positive extremity of the wave shape to be clamped above 0 volts?
Last Answer : Positive bias.
Description : A negative damper with negative bias clamps the most positive extremity of the output wave shape to what polarity (positive or negative)?
Last Answer : Negative potential.
Description : A negative damper damps which extremity of the output waveshape to 0 volts?
Last Answer : Most positive.
Description : What type damper (with bias) clamps the most negative extremity of the output waveform to a negative potential?
Last Answer : Positive clamper with negative bias.
Description : To which polarity does a positive damper with positive bins clamp the most negative extremity of the output waveform (positive or negative)?
Last Answer : Positive potential.
Description : How can a series-positive limiter be modified to limit unwanted negative portions of the input signal?
Last Answer : Biasing.
Description : Which portion of a sine-wave input is retained in the output of a series-negative limiter?
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 : What will be the output of Q if J is HIGH, PS and CLR are HIGH, and the clock is going negative?
Last Answer : Set, or HIGH (1).
Description : . In a common anode, seven-segment LED display, an individual LED will light if a negative voltage is applied to what element?
Last Answer : The cathode.
Description : What is a negative ion?
Last Answer : A negatively charged atom having more than its normal amount of electrons.
Description : Does a rectifier tube conduct on the positive or negative alternation of the input signal?
Description : The point on the current curve of a gallium-arsenide semiconductor at which it begins to exhibit negative resistance is called what?
Last Answer : Threshold.
Description : What causes the negative-resistance property of tunnel diodes?
Last Answer : The tunneling action
Description : Why is the negative-resistance magnetron often operated with reduced filament voltage?
Last Answer : To reduce the effects of filament bombardment.
Description : What starts the oscillations in a negative-resistance magnetron?
Last Answer : The application of the proper magnetic field.
Description : How is a negative charge created in a neutral body?
Last Answer : Through the accumulation of excess electrons.
Description : A large negative voltage is applied to the plate of a diode, and a largewhat tube parameter has been exceeded?
Last Answer : Peak Inverse Voltage (PIV).
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 : Which digital data encoding method records a digital one as a positive pulse and a digital (zero) as a negative pulse and returns the tape to neutral between pulses?
Last Answer : Return-to-zero (RZ) encoding.
Description : An electron moves into the electrostatic field between a positive charge and a negative charge. Toward which charge will the electron move?
Last Answer : Toward the positive charge.
Description : How do electrons get from the negative electrode to the positive electrode?
Last Answer : By current flow through the load.
Description : In the primary cell, why are negative ions attracted to the negative terminal of the cell?
Last Answer : The positive charge caused by electrons leaving the negative electrode attracts the negative ions.
Description : What is another name for the (a) positive electrode, and the (b) negative electrode?
Last Answer : a) The anode, (b) the cathode.
Description : Define the performance coefficient of a refrigerator. ?
Last Answer : : The ratio of heat removed from low temperature heat to work performed by an outside company is called the performance coefficient of the refrigerator.
Description : What is friction? Define coefficient of static friction and coefficient of kinetic friction.
Last Answer : What is friction? Define coefficient of static friction and coefficient of kinetic friction. Give the necessary formula for each.