What are four things that affect the resistance of a wire?
There are 4 different factors which affect resistance:
- The type of material of which the resistor is made.
- The length of the resistor.
- The thickness of the resistor.
- The temperature of the conductor.
What is the best description for high electrical resistance?
A high electrical resistance of an electrical conductor is the opposition to the flow of an electric current through that conductor; the inverse measure is known as electrical conductance. The SI unit of electrical resistance is the ohm (O).
What does it mean if something has high resistance?
Resistance measurements are normally taken to indicate the condition of a component or a circuit. The higher the resistance, the lower the current flow. If abnormally high, one possible cause (among many) could be damaged conductors due to burning or corrosion.
Does low resistance Mean High Voltage?
Voltage or potential difference is the measure of potential energy between two points in a circuit and is commonly referred to as its ” volt drop “. Resistance is the opposition to current flowing around a circuit. Low values of resistance implies a conductor and high values of resistance implies an insulator.
Is high voltage low current dangerous?
Higher voltage allows for the production of higher, more dangerous currents. Resistance opposes current, making high resistance a good protective measure against shock. Low voltages can still be dangerous even if they’re too low to directly cause shock injury.
Which is more dangerous high voltage or high current?
The higher the current, the more likely it is lethal. Since current is proportional to voltage when resistance is fixed (ohm’s law), high voltage is an indirect risk for producing higher currents. Duration. The longer the duration, the more likely it is lethal—safety switches may limit time of current flow.
Is 1 ampere a lot?
We humans get an electric shock when sufficient current flows through our body… and one amp is more than sufficient to kill you many times over. However, because our resistance is relatively high, it takes significant voltage to push serious amounts of current through us.