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The Question & Answer (Q&A) Knowledge Managenet

The Internet has many places to ask questions about anything imaginable and find past answers on almost everything.

Table of Contents

- What precautions do you need to observe when measuring voltages?
- What are the precautions in measuring the AC voltage?
- What must be observed when measuring DC voltage?
- What are the two types of ammeters?
- What do you use to measure voltage?
- What is available voltage?
- How do you find voltage?
- What is voltage example?
- How many types of voltage are there?
- What is difference between current and voltage with example?
- What is difference between voltage and current?
- Which comes first voltage or current?
- What exactly is voltage and current?
- What are the function of current?
- How does voltage cause current?

Be mindful of the voltage you are measuring. When measuring AC voltage, for instance, do not allow the probe tips to touch one another when they are still connected to their respective point on the electrical circuit. This is to avoid shorting the circuit which can create a spark or ball of flame that can harm you.

Be sure that the multimeter is switched to AC prior to trying to measure AC circuits. De-energize and discharge the circuit completely prior to connecting or disconnecting to a multimeter device. Check proper dc polarity when measuring dc. Constantly begin with the highest voltage or current range.

The meter leads, as in the case of the ohmmeter function, must be connected to the proper meter jacks. When you measure dc voltages, be sure the red lead is the positive lead and the black lead is the negative, or common, lead. The higher the meter resistance, the less it will load the circuit.

- Type of Ammeter.
- 1-Moving coil Ammeter.
- 2-Moving magnet Ammeter.
- 3-Electrodynamic Ammeter.
- 4-Moving irom Ammeter.
- 5-Hot wire Ammeter.
- 6-Digital Ammeter.
- 7-Integrating Ammeter.

Voltage is a measurement of potential electric energy between two points. You can measure the voltage of household circuitry or batteries using a digital multimeter, an analog multimeter, or a voltmeter. Most electricians and novices prefer a digital multimeter, but you can also use an analog multimeter.

Meaning of available voltage : The amount of voltage available at any point in the circuit.

Ohms Law and Power

- To find the Voltage, ( V ) [ V = I x R ] V (volts) = I (amps) x R (Ω)
- To find the Current, ( I ) [ I = V ÷ R ] I (amps) = V (volts) ÷ R (Ω)
- To find the Resistance, ( R ) [ R = V ÷ I ] R (Ω) = V (volts) ÷ I (amps)
- To find the Power (P) [ P = V x I ] P (watts) = V (volts) x I (amps)

Voltage, also called electromotive force, is a quantitative expression of the potential difference in charge between two points in an electrical field. An example of direct voltage is the potential difference between the terminals of an electrochemical cell.

There are two types of voltage, DC voltage and AC voltage. The DC voltage (direct current voltage) always has the same polarity (positive or negative), such as in a battery. The AC voltage (alternating current voltage) alternates between positive and negative.

Voltage, also called electromotive force is simply the energy per unit charge. In other words, voltage is the difference in electric potential between two points. Current is just the rate of flow of electric charge….Related Articles:

Current Electricity | Electric Current Formula |
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EMF Formula | Ohm’s Law |

In simple words, the current is the flow of electrons between two points forced by voltage. Voltage is the difference in the electric potential energy, per unit of charge between two points.

Originally Answered: Who comes first voltage or current ? Current flows AFTER the two points having potential difference (voltage) are connected. Hence voltage comes first.

Voltage is the difference in electric potential energy between two points per unit electric charge. The voltage between two points is equal to the work done per unit of charge against a static electric field to move the test charge between two points. It is measured in Volts. Current is a flow of electric charge.

So when you talk of a conductor it a pipe with stagnant water and as current is rate at which charges flow it is obvious that there has to be some pressure difference between the ends the end of the conductor which may be due to the power supply or external circuit and so current is due the voltage.

Voltage generates the flow of electrons (electric current) through a circuit. The specific name for the source of energy that creates the voltage to make current flow is electromotive force. This relationship between voltage and current is given by Ohm’s law. The voltage exists whether the charge is present or not.