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What is a typical dc resistance for a crt deflection coil. does 0.2 ohms seem reasonable?
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Why shunt resistance used in ammeter and why is it connected in parallel?
An ammeter's coil requires very little current for full-scale deflection (fsd). So, to measure a current above its fsd value, most of that current must be allowed to bypass the coil. This is achieved by placing a very low value shunt resistance in parallel with the coil ('shunt' is an archaic word for 'parallel').
Why deflection of the magnetic needle placed in a coil carrying current increases as the number of turns in the coil increases?
Deflection of the magnetic needle placed in a coil carrying current increases as the number of turns in the coil increase because as the number of turns in the coil increases the strength of the magnetic field also increases.
What is weston galvanometer?
The weston type galvanometer is a moving coil galvanometer in which a pointer is attached to the coil for measuring deflection due to torque .
What is called the winding around the CRT yoke that deflects the electron beam with its magnetic field?
It's called a deflection coil. If a c.r.t. uses magnetic deflection, there will be two deflection coils, a horizontal one and a vertical one.
Which of the coil of the wattmeter has high resistance?
The voltage (or 'potential') coil has the higher resistance, because it is connected in parallel with the load.
When Replacing 12v coil on 1998 Kubota engine wg750 could it have resistance type external wiring from coil to distributor or is resistance internal in coil?
A engine coil has a high internal resistance, the needing of a suplementar resistance may be advised to you by a car electrician, who works with such brand and model of your car.
On an 86 Toyota truck what should the pickup coil resistance be?
Distributor pickup coil resistance 140-180 ohms.
What is 99 silhouette 4.3 firing order on coil?
At 6500-11500 ohms, the resistance on the ignition coil is okay. If the resistance exceeds 11500 or below 6500, the coil requires replacement.
Why is there a difference in current in a coil when you apply dc voltage and then AC voltage to it?
A coil has both resistance and inductance. When you apply a d.c. voltage, the opposition to current is the resistance of the coil. When you apply an a.c. voltage, the opposition to current is impedance -the vector-sum of the coil's resistance and its inductive reactance. Inductive reactance is proportional to the inductance of the coil and the frequency of the supply.
Does the resistance of coil remain same through out of experiment why?
The resistance of the coil does not remain the same throughout the experiment because the voltage across and the current is varied.
Define the deflection sensitivity of CRT?
There is basically two cases: (It is recommended to read about Cathode Ray Tube Deflection prior to read this) 1 - Electrostatic Deflection: Is the voltage necessary to move the electronic beam by a unit of lenght. Usually is V/cm or V/in. Since there is no significant current flowing on the deflection plates, and these kind of CRTs (Cathode Ray Tubes) are using on measuring devices (on wich the lenght of the trace on the screen will be measured in a way or another), only the voltage is relevant on the specification of the CRT, and its effect on the moving of the bean. CRT manufacturers made a tremendous effort to make the relationship between the Voltage on the plates and the beam deflection to be linear. 2 - Magnetic Deflection: Used on most popular CRTs, as TVs, Monitors (now being replaced by LCDs). Is the product of the square of the total (Ap-p)current needed to deflect the beam tottaly on the screen (from left to right - horizontal deflection, or top to bottom - vertical deflection), and the inductance of the coil. It is understood as the minimum energy that the inductor (the deflection coil) must store to generate the magnetic field and move the beam totally on the screen. Magnetic is the most complicated deflection since there are several factor affecting the performance of the circuit, i.e. coil resistance, geometric limitations, core saturation, variation of core permeability. Is the product of the inductance of the coil by the peak-to-peak current, squared. Most of the time is given in mHApp^2, but less often found in OhmsApp^2 Needless to say that the CRT using this kind of deflection uses several types of correction of linearity, because now the beam does no move in a linear way with the surface of the screen. The most popular are East-West correction, Pin-Cushion correction, and S-correction. There is basically two cases: (It is recommended to read about Cathode Ray Tube Deflection prior to read this) 1 - Electrostatic Deflection: Is the voltage necessary to move the electronic beam by a unit of lenght. Usually is V/cm or V/in. Since there is no significant current flowing on the deflection plates, and these kind of CRTs (Cathode Ray Tubes) are using on measuring devices (on wich the lenght of the trace on the screen will be measured in a way or another), only the voltage is relevant on the specification of the CRT, and its effect on the moving of the bean. CRT manufacturers made a tremendous effort to make the relationship between the Voltage on the plates and the beam deflection to be linear. 2 - Magnetic Deflection: Used on most popular CRTs, as TVs Monitors (now being replaced by LCDs). Is the product of the square of the total (Ap-p)current needed to deflect the beam tottaly on the screen (from left to right - horizontal deflection, or top to bottom - vertical deflection), and the inductance of the coil. It is understood as the minimum energy that the inductor (the deflection coil) must store to generate the magnetic field and move the beam totally on the screen. Magnetic is the most complicated deflection since there are several factor affecting the performance of the circuit, i.e. coil resistance, geometric limitations, core saturation, variation of core permeability. Is the product of the inductance of the coil by the peak-to-peak current, squared. Most of the time is given in mHApp^2, but less often found in OhmsApp^2 Needless to say that the CRT using this kind of deflection uses several types of correction of linearity, because now the beam does no move in a linear way with the surface of the screen.
How do you convert galvanometer to an ohmmeter?
"An ohmmeter is an electrical instrument that measures electrical resistance, the opposition to an electric current."The unit of measurement for resistance is ohms (Ω).It is useful device for rapid measurement of resistance. It is consist of galvanometer and adjustable resistance Rs of known value and a cell connected in series. The resistance R to be measured is connected between the terminals.The series resistance Rs is so adjusted that when the terminals are short circuited i.e., when R = 0, the galvanometer gives full scale deflection. So the extreme graduation of the usual scale the galvanometer is marked 0 for resistance measurement. When terminals are not joined no current passes through the galvanometer and its deflection will be zero . Thus zero of the scale marked as infinity. . When R is not infinite , the galvanometer deflects to some intermediate point depending on the value of R scale can be calibrated to read the resistance directly.
