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How do you shift an ac phase?
It really does depend upon what you mean by 'shift'. For purely-resistive circuits, the load current is in phase with the supply voltage. For reactive circuits, the load current will lead or lag the supply voltage; for capacitive-resistive circuits, the load current leads, whereas for inductive-resistive circuit, the load current lags. You can change the angle by which the current leads or lags (the 'phase angle') by changing the amount of resistance or reactance.
What do Power supply symbols mean?
For instance, there is the difference between -direct current- and -alternate current- For example: a simple battery gives direct current, e bicycle-dynamo generates alternate-current, so plus becomes minus and vice versa several times a second. A symbol for direct current can be: ____ - - - A symbol for alternate current is a small sine-wave: ~
What happens if AC is supplied to a DC pump?
By a current pump you might mean an electronic circuit using transistors or an IC. These circuits often do not take a wrong supply very well and it might be destroyed.
What does it mean to source current?
the source current is the current that flows from the power source.
When does a thermostor obey ohm's law?
I hope you mean the thermistor. If so,well it does not obey Ohms law. When current flows through the thermistor its temperature start increasing which reduces the resistance of the thermistor. A reduction in resistance at the same supply voltage will cause the current to increase. Thus it's not obeying Ohms law.
Why you use 0.707for rms values?
reciprocal of the square root of 2, converts from peak voltage to rms voltageAnother AnswerThis figure results when you work out how much work is done by one complete cycle of a.c. current. Since work is proportional to the square of a current, if you divide one complete cycle of a sine wave current into lots and lots of instantaneous values, square each of these values, find their average (mean) value, then find the square root of that value, you will have found the 'root-mean-square' of the current over a complete cycle. This value always works out to 0.707 x the peak or maximum value of the sine wave. For other waveforms, other r.m.s. values result.
Do you have a water cycle in your front yard?
Yes, every part of the earth is involved in the water cycle. If you mean complete water cycle then no, but part of the water cycle exists in your front yard
The time it takes to complete one cycle of a signal is known as?
The time it takes to complete one cycle of a signal is called one period. For example, if the signal has a frequency of one hertz (one cycle per second), the period would be 1 second. A two hertz frequency would mean a ½ second period, or ½ second to complete one cycle.
What is the signal used for DMA in 8085?
The HOLD pin indicates that an external device wants the 8085 to stop and allow the external device to drive the bus. The acknowledge of control transfer is HLDA, however, it is important to note that HLDA does not mean the current cycle is complete - it means that the current cycle is the last cycle, at which point the 8085 will release the bus. (One half clock cycle later.)
The effective value of ac voltage is calculated as?
EFFECTIVE HOW ABOUT AVERAGE .639 of peak.AnswerThe 'effective' value of an a.c. voltage (or current) is the same as its 'root-mean-square' (r.m.s.) voltage which, for a sinusoidal waveform, is 0.707 Umax.The 'average' value of an a.c. voltage (or current) is zero over a complete cycle, or 0.639 Umax, over half a cycle (usually applied to rectified waveforms).
Smps fan mean?
Switch mode power supply (smps) converts 110-230 volts of alternating current to direct current that computer components need. The fan keeps the power supply cool.
What does the power supply unit must be toasted mean?
The statement "the power supply must be toasted" is a rather idiomatic way of saying, the power supply must have been destroyed by excess current.
How much current flows in a 12 watt radio connected to a 120 volt supply?
Assuming that you mean connected to 120 Volts (V) supply, start with Power(P)=Current(I) x Voltage(V), and if P=V*I, then I=P/V. I=12W/120V=0.1A or 100mA and that is your current.
AC or DC supply is given to a bulb which gives more illumination?
In AC supply, the RMS current is the effective current for power used in a resistive circuit. This is defined as the square root of the mean value of the square of the current, taken over a whole cycle. The RMS current dissipates power at the same rate as a DC current of the same value. A light bulb of course gives out light dependent on the current through the filament. So if the RMS current and the DC current are the same value, the light produced will be equal. With AC supply, the RMS value of current and volts is 1/(square root of 2) x the peak value, so peak value = 1.414 x RMS value. If you supplied DC at volts and current equal to the peak AC value, the power given to the light bulb would clearly be greater. Therefore to answer your question you have to specify what relative values your AC and DC supplies have.
Heating effect of a 5 amp of AC compared to 5 amp of DC?
Electrical current alone has no heating effect. Current through a device, with a voltage across the device will have a heating effect. The equation for calculating it is power = voltage x current, where power is proportional to the heating effect If the AC supply is measured as an RMS voltage and an RMS current and the device is resistive, then the heating effect will be identical to the same values with a DC supply. RMS means the "average" voltage or current of an AC supply whereas the peak AC voltage refers to the highest voltage that is reached on each cycle. However, if the device is not just resistive but is inductive, the heating effect will be lower with an AC supply than with a DC supply. By inductive, we mean that the device has a coil or capacitor, for example, in the circuit. The reasons why are outside the scope of this answer but are explained in many electronics text books, or look up "power factor" on google
How does the water cycle keep the earth's water supply constant?
earth remain Fly constrant over time though this does not mean that precipitation will increase
What do you mean by biogeochemical cycle?
The biogeochemical cycle is a complete transformation which includes biological, chemical, and geological factors that contribute towards a specific reaction. A good example would be atmosphere change and precipitation.
