Because if DC is used, solution undergoes electrolysis and the products of electrolysis set up a back emf which opposes the flow of current
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AC is used at high frequencies in conductometric titration to minimize electrolysis effects and polarization at the electrode surface. At high frequencies, these effects are reduced, resulting in better sensitivity and accuracy of the titration measurements. Additionally, using high frequency AC helps to maintain a constant electrolyte concentration and minimize errors in the conductometric titration process.
Yes, both Kirchhoff's Current Law (KCL) and Kirchhoff's Voltage Law (KVL) can be applied to both AC (alternating current) and DC (direct current) circuits. KCL states that the sum of currents entering a node must equal the sum of currents leaving the node, regardless of the type of current. Similarly, KVL states that the sum of voltage drops in a closed loop circuit must equal the sum of voltage rises, a principle that applies to both AC and DC circuits.
An electrical device that converts alternating current into direct current is a rectifier. Diodes, which pass only current going one direction, are a type of rectifier. Most power supplies for electronic equipment contain rectifiers along with other components to "clean" the DC power output.
The direction is not reversed. Their is a phase change that occurs. Think of a sine wave moving past a given point. at one point in time, the wave is at a peak, then crosses through zero and then reaches a peak that is 180 degrees out of phase before crossing zero again.
With the rectifier alone, the result is d.c. but with a voltage ripple caused by the rectifier diodes not being absolute in action. The rectifier needs following with a smoothing circuit, a suitable capacitor at its simplest, to remove the ripple.
AC is used at high frequencies in conductometric titration to minimize electrolysis effects and polarization at the electrode surface. At high frequencies, these effects are reduced, resulting in better sensitivity and accuracy of the titration measurements. Additionally, using high frequency AC helps to maintain a constant electrolyte concentration and minimize errors in the conductometric titration process.
AC current is used in motors.
AC current cannot be stored, it must be used as it is generated.
Throughout the world the system used for home electrification is alternating current (AC).
The letter "I" is normally used for direct current, or for the average current in the case of AC. The lower-case version, "i", is used for the instantaneous current, in the case of AC.
AC
It is used to detect very small DC currents only. For AC signals Detectors are used.
There are lots of diodes - a "diode" is simply a device that has two electrical connections.If you refer specifically to the rectifying diode, it is used to convert AC current to DC current - so, it is used in a circuit that has BOTH AC and DC.
DC current is not used in home wiring. It may be used to power a door bell, alarm system, under counter lights, etc, that uses a transformer powered by AC that converts the power to DC. Other than that homes are wired for AC current only.
Alternating current (AC) in almost all cases.
No, alternating current (AC) can also be used to charge batteries using a charger that converts AC to DC. The charger will convert the AC power from the outlet to DC power that is suitable for charging the battery.
A rectifier.