How are ammeters and voltmeters are connected to measure current and voltage in real circuits?

Answer 1

Connect the voltmeter ACROSS the load (i.e., in parallel with the load).

Connect the ammeter in the circuit with the load (i.e., in series with the load).

If this doesn't make sense to you, ask the question again being specific about what kind of circuit you have, and I can respond in terms of the particular arrangement you're working with.

Answer 2

Newshound gave a very good answer, but let's simplify it a little bit. First, you need a very good understanding of Ohms Law. You'll also need at least one very low resistance resistor, and 1 voltmeter that can read, accurately, down to .01 volts. The voltage reading is of course taken across the load, be that across the supplying battery, or the device itself. For the current test, you need that low value resistor between either the red lead going into the device under test and it's power source, or between the negative lead of the device, and ground, or the return to the power supply. Read the voltage across the resistor. Using Ohms Law, the voltage divided by the resistance will give you the amperage being drawn by the circuit. This works great for measuring the current in a vehicle. All you need to know is the resistance of the ground strap from the negative terminal of the battery, to the chassis of the car. The voltage across it is the current being drawn by the loads in use in the car.

Answer 3

ALWAYS WORK SAFELY!DO NOT PLACE YOURSELF IN THE PATH OF CURRENT FLOW!NEVER HANDLE HOT LEADS WITH BARE HANDS!
To measure current with an Ammeter:First make certain to have an ammeter of sufficient capacity to handle the total current flowing in the circuit.Second,make sure the meter is in it's highest range of measurement.Third,place the ammeter in series with the positive ,or red wire,taking the polarity of the meter into account so the meter is not destroyed or if it is an analog meter,the shock of reverse movement does not uncalibrate the meter movement.Also remember that placing the meter in the negative,or black lead will effectively raise the ground potential of the circuit above 0 volts.It may cause damage to the circuit and present a danger to you.Adjust the range of the meter to read the most accurate measurement.
To measure voltages,you may place the test leads in parallel to the voltage source,again making certain the polarity of the meter leads are correct and the voltage range of the meter is sufficient to ensure safe and accurate measurement.Placing the meter in it's highest measurement range before connecting it to the circuit is a good habit to have,and is the prescribed method to work with. Always follow common sense safety rules so you may live another day.

Answer 4

In real circuits you can't just cut a wire, or a trace, and put an ammeter in series to monitor current in a particular trace. Therefore you must count on ohms law to help you. You can monitor voltage at a resistor of a known value, if there is one to probe. Take the voltage and divide it by the resistance of the resistor, and you have current.

Answer 5

no longer something will be defective the following... the final rule is that the voltmeter will continuously examine the voltage of the gadget it truly is linked parallel to it in case you connect the voltmeter for the time of a resistor it is going to degree the voltage that looks throughout the resistor case in point if the resistor has a resistance of 10 OHMS and 10 amps of modern-day flows through t the voltage throughout the resistor is 100V (in accordance to OHMS regulation) which could also be the voltmeter examining in case you connect the voltmeter throughout the ammeter the voltmeter will examine the voltage throughout the ammeter it truly is very small because the ammeter have very low resistance assume the resistance of the ammeter is contained in the order of .01 OHMS and of the present through the ammeter is 10 amps the voltage drop is .a million volts and the voltmeter wil no longer stumble in this replace