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Constant voltage power supplies will maintain a constant voltage under varying?
Wiki User
∙ 14y ago
current.
Wiki User
∙ 14y ago
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Distinguish between constant parameter and time varying parameter system?
A constant parameter is one that does not vary over time, or varies so slowly, or within a very small, allowable range, that it can be used as a constant. One such parameter is the average temperature of the universe, which is 3 Kelvin. We theorize that over time it will gradually decrease with the expansion of the universe, but in practical terms, in a period of billions of years, it is held as a constant. Diurnal light and dark cycles (day time and night time) is an example of a time varying parameter. The intensity of solar radiation, measured in a specific location, varies continuously during each day, and the length of each day varies continously through the year.
Will a LED shine brighter if it is connected to a higher voltage?
A LED has a forward voltage drop dependent on it's composition. It is fairly constant within a small range of current flow. If the voltage is too high and the current is not limited, the LED will burn out. The brightness can be varied by varying the available current, but the voltage across the LED remains virtually the same.
Why ac voltage varying?
AC voltage is varying because it is sinusoidal in nature
Would it be correct to say with a fixed field voltagethe speed of a shunt motor is proportional to its armature voltage?
With increasing torque load the armature tends to slow down; the motor draws more current to compensate, and if there is armature resistance the back emf generated by the armature falls to allow the increased current to flow, which causes the motor to settle at a lower speed. The mechanical output power is the speed times the torque, and increasing the torque increases the power output provided the speed does not drop much.
What is undamped oscillation?
Oscillations (vibrations) are damped when they are changed by some action. For example, touching an oscillating (vibrating) tuning fork with your finger is said to be damping it. The oscillation (number of Hertz) of an electrical oscillator, such as a TV tuner, is changed by varying the settings of the tuner.
Can a body have a varying speed if its velocity constantif yes?
No, because constant velocity means constant speed and constant direction
Can an object have varying speed if its velocity is constant?
no
Can a body have a constant but a varying speed and vice's?
no
What is the difference between constant rate and varying rate?
constant rate means that rate which is fixed and can not be changed. varying rate is that rate which is not fixed and can be change easily.
Why ohms law is valid only for constant temperature and constant pressure?
Because by varying temperature ,the conductivity hence the resistivity varies so the constant varies.
Can an object have a constant speed and the varying velocity at the same time explain?
Velocity is a vector. A vector has a magnitude and a direction. The scalar or magnitude portion of velocity is speed. Velocity is a constant only when both the speed and direction are not varying. Hence, when the speed is changing, the velocity cannot be a constant.
What is the effect of varying the temperature on the volume of a constant mass of a gas at a constant pressure?
the relation is given by charles law which says that the volume of a constant mass of gas at constant pressure is directly proportional to the temperature so increase in temperature causes an increASE in the volume
Which of these are present throughout an air mass A About constant temperature and humidity B varying wind speeds C constant sustained winds at high altitudes D migrate within the general circulation?
A About constant temperature and humidity B varying wind speeds D migrate within the general circulation
Speed is usually not constant usually object has what type of speed?
Changing, varying or accelerating
Does gas retain it's volume at varying temps and pressures?
It can but, not necessarily so. At a constant volume the temperature and pressure rise in direct proportion. At a constant temperature the volume is inversely proportionate to the pressure. At a constant pressure the volume is directly proportionate to the temperature.
Can an object have a constant speed and a varying velocity at the same time?
Yes, for example, if it moves in a circle.
What kind of systematic errors are detected by varying the sample size?
I believe a varying sample size detects a constant error which is a type of systematic error.
