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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.
Is LDR an ohmic conductor?
A Light Dependent Resistor (LDR) is not considered an ohmic conductor. Ohmic conductors follow Ohm's Law, where the current through the material is directly proportional to the voltage across it, resulting in a constant resistance. In contrast, the resistance of an LDR changes with varying light intensity, leading to a non-linear relationship between voltage and current. Thus, its behavior does not conform to ohmic characteristics.
Why ac voltage varying?
AC voltage is varying because it is sinusoidal in nature
Is flux only produce in ac supply or in both ac and dc?
Flux is produced in both AC and DC systems, but the nature of the flux differs. In DC circuits, the magnetic flux is constant, as the current flows in one direction. In AC circuits, the magnetic flux changes direction and magnitude periodically, resulting in a time-varying magnetic field. Thus, while both types of current can produce flux, AC generates a dynamic flux due to its oscillating nature.
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 is the speed of a shunt motor is practically constant?
The speed of a shunt motor is practically constant because the field winding is connected in parallel with the armature winding, which means the field flux remains relatively constant regardless of the load changes. This allows the motor to maintain a consistent speed under varying load conditions.
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 an advantage of a constant-speed propeller?
An advantage of a constant-speed propeller is that it allows the pilot to maintain a constant engine speed while varying the pitch of the propeller blades. This helps optimize engine performance at different airspeeds and altitudes, leading to increased efficiency and improved overall aircraft performance.
Can an object have constant speed and varying velocity at the same time?
No, an object cannot have constant speed and varying velocity at the same time. Velocity is a vector quantity that includes both speed and direction. If velocity is varying, then speed must also be changing as the object's direction changes.
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.
Can a body have a constant velocity and still have a varying speed?
Yes, if you are going in a circle or otherwise changing direction.
