Which of the following method technique can be used for the measurement of high DC voltage?
Electrostatic voltmeters of the attracted disc type may be connected across the high voltage circuit directly to measure up to about 200 kV, without the use of any potential divider or other reduction method. [The force in these electrostatic instruments can be used to measure both a.c. and d.c. voltages].
How does an ammeter measure DC current?
To measure current, you must connect the two leads of the ammeter in the circuit so that the current flows through the ammeter. In other words, the ammeter must become a part of the circuit itself. The only way to measure the current flowing through a simple circuit is to insert your ammeter into the circuit.
How are high DC voltages and currents measured?
• High dc voltages are usually measured by connecting a very high resistance (few hundreds or Mega ohms) in series with a micro ammeter. • Current I flowing through large calibrated resistance R is measured by Moving Coil Micro ammeter.
How to measure the phase of an inductor?
Usually you want to test it in the frequency region it will be used. Then decide if you want to add DC bias current and AC couple the signal to isolate from your DC power supply. Normally RLC meters use a constant current sine wave at 1 kHz up to 1 MHz. Then measure the voltage and phase to compute RLC.
How to measure DCR in an inductor?
You can use series or parallel resonance depending on what impedance you choose at resonance and what Q you expect from either mode. Here 100 kHz is ~ 100 ohms and Q of 30 dB implies 0.1 ohm for DCR. This can be limited by your driver GBW product. 300 ohm (1+f) / GBW = Rout unless current limited.
How to calculate the inductance of a capacitor?
Edit: I add a screencap of one of the calculations, which provides the values of the inductance and the inductor resistance. The method you use is very error sensitive, ESR can be an issue but also determining the exact voltage ratios isn’t easy. Get a 1% (or better) accurate capacitor.