Voltage is the cause and current is its effect. Voltage is the potential difference between two points. When charges flow due to this potential difference, we say that current is flowing.
Voltage and current can be compared to a water reservoir with tubes connected to the outlet, the reservoir is the supply. Now, voltage is compared to the pressure of the water at the outlet of the reservoir, and current compared to the the volume of the water that flows through the tubes, the thicker and shorter the tubes, the less the resistance and larger the volume of water passing through the tubes. To measure voltage, a volt meter is connected across the output terminals of the supply; to measure current (in units of amperes), one of the wires connecting a circuit to to the supply is cut, and a ammeter is connected to the two ends; or if there is a switch in the circuit it can be switched off, and the current can be measured across the terminals of the switch. The best way to measure current is by using a clamp type ammeter.
Voltage (sometimes called electric potential difference) is the electrical driving force set up by an electric potential difference. There are several ways to create an electric potential difference, but in any case, it is voltage that causes current flow if there is some kind of circuit or current path to support the flow. Current or current flow is the actual movement of electrons through the branches of a circuit when voltage (the "motivational force" that causes current flow) is applied.
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The arc utilized for arc welding is low voltage high current discharge. The voltage required for maintaining an arc is less than for striking the arc. Voltage drops & current increases as the arc is developed. The voltage required to strike DC arc is about 50-55 V & for AC is 80-90 V.It is difficult to maintain the arc with voltage less than 14V or more than 40V.READ ELECTRICAL TECHNOLOGY BY B L THAREJA / AK THAREJA
Current gain is the ratio of output current divided by input current. Voltage gain is the ratio of output voltage divided by input voltage. Nothing more complicated than that.
Parallel circuit: The fact that the voltage is the same follows from Kirchoff's Voltage Law. Series circuit: The voltages of the individual resistances must add up to the total voltage. This, too, follows from Kirchoff's Voltage Law. If the resistances have the same values, all of them will drop the same voltage (which, of course, will be less than the total resistance). But if they are different, Kirchoff's current law tells us that the same current must flow through each resistor in series - and the voltages will be different in this case, according to Ohm's law.
Reason: The common Emitter mode has voltage and current gain better than the other two configurations(CB and CC). i.e it has a current gain greater than that of CC mode and greater voltage gain than that of CB mode.
Unless otherwise stated, the value of an a.c. current or voltage is expressed in r.m.s. (root mean square) values which, for a sinusoidal waveform, is 0.707 times their peak value. The output of a voltage (or potential) transformer is no different, its measured voltage will be its r.m.s value which is lower than its peak value.
A parallel circuit has more than one current branch. In a parallel circuit, the components are connected in separate paths to the voltage source, allowing for multiple current paths and different current levels through each branch.
A step-up transformer increases the voltage of an electrical current by having more turns in the secondary coil than in the primary coil. This causes the magnetic field to induce a higher voltage in the secondary coil, resulting in an increase in voltage.
The "force" that pushes an electrical current is the voltage. It isn't really a force, but it may help to visualize it as such. Physically, it has different units than a force.
yes they do! :) Europe uses a different voltage than the US and also has different shaped electrical plugs, so you can't just plug a European appliance into an American electrical outlet. If you can get the right kind of current, then the appliances will still work.
A reverse current relay prevents a generator from discharging the battery when generator output is less than battery voltage. When generator output is greater than battery voltage, the reverse current relay closes and connects generator to electrical bus.
Low voltage is a relative term, as there is no 'level' at which a voltage is rated 'low'. Electrical safety codes define low voltage as circuits that do not require the same protections necessary at higher voltages.
The arc utilized for arc welding is low voltage high current discharge. The voltage required for maintaining an arc is less than for striking the arc. Voltage drops & current increases as the arc is developed. The voltage required to strike DC arc is about 50-55 V & for AC is 80-90 V.It is difficult to maintain the arc with voltage less than 14V or more than 40V.READ ELECTRICAL TECHNOLOGY BY B L THAREJA / AK THAREJA
AC current is considered better than DC current for electrical power distribution and transmission because it can be easily converted to different voltage levels using transformers, allowing for efficient long-distance transmission. Additionally, AC current is able to travel over long distances with minimal power loss, making it more practical for widespread distribution of electricity.
High voltage loads is a high electrical discharge that can result to electrical breakdown. Example: High power amplifier vacuum tubes or particle beams. High current loads are the loads that can have peak current greater than 10 amps. Example: Motors, solenoids or nitinol wire.
Current gain is the ratio of output current divided by input current. Voltage gain is the ratio of output voltage divided by input voltage. Nothing more complicated than that.
A reverse current relay prevents a generator from discharging the battery when generator output is less than battery voltage. When generator output is greater than battery voltage, the reverse current relay closes and connects generator to electrical bus.
Since an incandescent light bulb is an appliance that has a fixed electrical resistance, operating it at less than its rated voltage means that it will draw less than its rated current and will produce less light.