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The whole point of earthing or grounding is to provide a low-impedance path back to the supply transformer in the event of an earth fault within a wiring installation, which will then enable sufficient earth-fault current to flow in order to operate the circuit's protective device (circuit breaker or fuse). When designing the circuit's protection system, it is therefore necessary to determine the resistance of the earth (ground) as it determines the value of this current.
What else can I help you with?
What will you need to measure to find out which wire has the greatest resistance?
To find out which wire has the greatest resistance, you will need to measure the resistance of each wire using a multimeter. Connect the multimeter to each wire separately and record the resistance values displayed. The wire with the highest resistance value will have the greatest resistance.
To measure DC of big bus bar?
A: TO measure the current on any path you will need a very small known resistance in sires and measure the voltage drop across it. If the resistance i not small then inaccuracy of reading will be evident
How you convert galvanometer into ammeter in detail?
By attaching a resistance in parallel connection with the galvanometer. Or when a low resistor connected in parallel with galvanometer ,the galvanometer is converted in ammeter. and the resistor is called shunt resistance.
How will you get 6.75 ohm resistance in combination of resistors bacause i have no any value resistor is available?
6.8 ohms is a standard value, and 6.8 is within 0.74% of 6.75. If you need a precise value, use a potentiometer or start playing with resistors, because resistors have tolerance and you will not be able to build an exact 6.75 by just looking at values - you need to measure combinations.
What is a resister in electronics?
The resistor a passive component is oppose the flow of electric current. How much it oppose to current it depend on the value of resistance and the value of resistance is mention on it on the color code format. you need to remember the value of every color.
Can you measure the internal resistance of dry cell using multimeter?
Well, you do use a multimeter to measure it, but not directly. You need at least one other thing besides the multimeter and the dry cell. Here's a simple way to do it: -- Take a resistor. With the meter set to measure resistance, measure the resistor's value. Call that 'R'. -- With the meter set to measure voltage, measure the voltage of the dry cell. Call it 'V1'. -- Connect the resistor across the dry cell. Measure the dry cell's voltage again. Call it 'V2 ' this time . V2 will be less than V1 . The internal resistance of the dry cell is R times (V1 - V2) / V2
.01 amps equal how many volts?
To calculate volts, you also need to know the resistance (ohms) in the circuit according to Ohm's Law. The formula to find volts is V = I x R, where V is voltage, I is current in amps, and R is resistance in ohms. So, to determine volts given 0.01 amps, you'd need the resistance value.
How do you convert a electric meter into a ammeter?
To convert an electric meter (usually a voltmeter) into an ammeter, you need to connect a low-resistance shunt resistor in parallel with the meter. This allows a portion of the current to bypass the meter, enabling it to measure the current flowing through the circuit. The shunt resistor's value is calculated based on the maximum current you want to measure and the internal resistance of the meter. Proper calibration is essential to ensure accurate readings.
How can you get a height on a person that is not able to stand?
You need to get a flexible measuring ruler... Lay them on the ground... And measure them that way.
I need to draw a circuit diagram to show this but I have no idea how do you find the resistance of a lamp in a circuit?
If you have a lamp, you can assume that the resistance of the lamp when it is under power will follow the ohms law. BUT, one thing you must remember is, when a lamp is under load, it is glowing HOT. When metal is HOT, the molculoes of the meals are in much more active state. When this happens, the resistance will increase. Conversely, when the lamp is NOT on ON state, the filaments are cold. Moleculoes in the filaments are not as active. Thus, the resistance is lower. There is almost 10 to 1 difference in resistance from hot to cold. Taking out a multimeter and measuring the resistance of the lamp will not help you determine the resistance of the lamp when it is actually under load (with voltage applied) Really, the only thing you can do is to measure the voltage, measure the current, then arrive at the resistance mathmatically.
How do you check with mega that you have good grounding on electrical circuit?
when you say "mega" I am asuming you mean meggar-ohmmeternot the lottery This instrument is not appropriate to test for good grounding Good grounding requires LOW resistanceA Meggar is used for measuring for HIGH resistances You need a MICRO-ohmmeter or ground resistance meter A company called AEMC makes nice ground testers
How do you ohm out a wire to test its electrical resistance?
To ohm out a wire and test its electrical resistance, you need a multimeter. Set the multimeter to the resistance (ohms) setting. Connect the multimeter's probes to each end of the wire. The multimeter will display the resistance value in ohms, indicating the wire's electrical resistance.
