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Explain quadrature null effect of coherent detector?
zero demodulated signal, which occurs for phase angle equal to + or - 90degrees, represent Quadrature Null Effect of the coherent detector.
Which detector is used in tv receivers?
Diode detector
What demodulators PLL is used?
FM detector And Evelope detector
What is is a passive ground detector?
it is a detector that does not change the conditions in which it is being used
What can be used as a magnet detector?
A magnet
Can a lie detector be used in theft cases?
A lie detector cannot be used in court. On rare occasions it can be used as an investigation tool. Check with an attorney.
What is polymorph used for?
Polymorph is used as a lie detector.
What are the various cases where use of a NULL value would be appropriate?
Optional data fields: NULL can be used to indicate that certain fields in a database can have no value assigned to them. Unknown data: NULL can be used to represent missing or unknown information. Default values: NULL can be used as a default value for a field until a proper value is provided. Uninitialized variables: In programming, NULL can be used to indicate that a variable has not been assigned a value yet.
If we reject the null hypothesis what can we conclude about the alpha risk?
If we reject the null hypothesis, we conclude that the alternative hypothesis which is the alpha risk is true. The null hypothesis is used in statistics.
What is null signals?
A: Practically all of the bridges used to find the value of passive components uses a null signal to determine the value In reality null means the lack of a signal where it is virtually eliminated when that occurs that is the null or no signal.
Null in programming?
in Russian Null means zero. in some languages Null is a macro for zero. in others Null is a single-tone object which referes to the value Null and thus could be compared to other values. Null has many names from nill Nill nil in diffrent languages. most of the time, Null is used to indicate, no value is set to a variable.
Disadvantages kelvin double bridge?
requires manual balancingsensitive null detector or galvanometer is required to detect balance conditionmeasurement current needs to be reasonably high to achieve sufficient sensitivity.
