Higher Resistance Lower Current

Short circuits are dangerous with high voltage power sources because the high currents encountered can cause large amounts of heat energy to be released.

Higher resistance lower current. You connect a hose to a hydraulic motor then another motor then an. Electrical resistance is a measure of the degree to which an object opposes an electric current through it. Resistance is likened to the diameter of a pipe. I didnt think it was but in this practice paper for gcse science b4 c4 p4 q9 p17 it says using the mark sceme that d 11 ω has the smallest current wouldnt it be a which is 3ω.

Current is likened to the flow of water in the pipe. Current is the same throughout the same series loop. A short circuit is an electric circuit offering little or no resistance to the flow of current. The voltage drops as you pass through each resistor.

Thanks for all replies x. Of these three explanations i m inclined to believe the third one. In this way it s totally fine to have high voltage values and low current in power lines. So it depends on the application if it is easier to generate a higher current or a higher voltage and you have to choose the resistor accordingly.

The power line has fairly low resistivity so the total resistance is low and so low voltage drop and low resistance yield low current in accordance to ohm s law. The smaller the diameter the higher the resistance. The first equation suggests that a higher resistance would be better while the second shows that a lower resistance would be better. The circuit with the higher resistance will allow less charge to flow meaning the circuit with higher resistance has less current flowing through it.

Resistance is the measure of opposition to electric current. Resistance is the opposition to current flowing around a circuit. Current is inversely proportional to resistance i 1 r resistance is measured in ohms and has the greek symbol ω or the letter r. If the voltage remains the same and the resistance decreases so the current will i.

I v r this shows that the current is inversely proportional to a change in the resistance. Low values of resistance implies a conductor and high values of resistance implies an insulator. In electric circuits does a higher resistance ω mean a lower current. This brings us back to georg ohm.

Voltage to the pressure in the pipe. Ohm defines the unit of resistance of 1 ohm as the resistance between two points in a conductor where the application of 1 volt will push 1 ampere or 6 241 10 18 electrons. So even if we have a voltage of say only 5 volts and a wire with a resistance of 0 01ω the circuit will produce a current of 500a 5v 0 01ω 500a which is a large amount of current. This can happen if you use a very low resistance wire with no resistor or other resistance in a circuit.