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phymath7
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- Why do we have to measure low resistance (in method of fall of potential )and galvanometer resistance (method of half-deflection ) for both direct and reverse current?
What is it's benefit?
I don't have reference from any higher level practical book but from a local writter of my country.So I am not providing reference as I think that won't be considered worthy.But my teacher said that it's done to nullify the effect of resistance of the connecting wires.I am not sure how that works.BvU said:Who says we do ? Do you have a reference, some context. a link ?
That doesn't make sense to me either. It would be a good way of identifying voltages that don't depend on the current direction, like a voltage offset from a battery, or voltages that depend too much on polarity, like a diode in the circuit. It's also just a good sanity check of the instrument and the circuit being tested. The answer should usually be the same, if it's not, more investigation is needed.phymath7 said:I don't have reference from any higher level practical book but from a local writter of my country.So I am not providing reference as I think that won't be considered worthy.But my teacher said that it's done to nullify the effect of resistance of the connecting wires.I am not sure how that works.
You haven't given us adequate context to understand what's being said. What connecting wires? What do they connect? Can you show us a diagram?phymath7 said:But my teacher said that it's done to nullify the effect of resistance of the connecting wires.I am not sure how that works.
Direct current (DC) flows in one direction only, while reverse current (AC) alternates direction periodically.
Direct current is typically generated through chemical reactions, such as in batteries, or through the use of a rectifier to convert AC to DC.
Direct current is commonly used in electronic devices, such as cell phones and computers, as well as in power transmission over long distances.
In terms of power transmission, direct current is more efficient as it experiences less energy loss due to resistance. However, AC is more efficient for long-distance transmission due to its ability to be easily converted to higher or lower voltages.
Yes, direct current can be converted to reverse current through the use of an inverter, which changes the direction of the current flow. This is commonly used in household appliances and solar energy systems.