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Current is inversely proportional to the resistance of the circuit. Resistance goes up, current goes down. Resistance goes down, current goes up.
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∙ 11y ago
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Do thin wires have a greater or lesser resistance to electron flow than do thicker wires?
Thinner wire has greater resistance than thicker wire, assuming the same amount of current.
A copper wire was left connected from one terminal of a battery to the other The wire became very hot Why did the wire get so hot?
The wire acted as the load across the battery terminals. Small short pieces of wire have a very low resistance. Ohms law states I = E/R. Current is directly proportional to the voltage and inversely proportional to the resistance of the circuit. So in other words if the resistance goes low the current (amperage goes high) It is this high current flowing through the wire that makes the wire hot. The higher the resistance the less of a current flow through the wire.
What property of the wire account the wire in filament behave differently other wires in the circuit when the current flow?
The resistance of the wire is the property that determines how the wire behaves when current flows through it. If the wire has a higher resistance, it will heat up more and potentially glow, like a filament in a light bulb. Other wires in the circuit may have lower resistance and therefore not exhibit the same behavior.
Why do batteries get warm?
Because they have internal resistance. Current flow through this internal resistance produces heat, just like current flow through ordinary resistors does. The current can be from use of the battery or charging the battery (if it is rechargeable). Usually the internal resistance of a battery increases with age, meaning older batteries tend to run hotter than fresh ones.
What are the effects of an open circuit?
The effect of an open circuit is that no current will flow.
If you wire up a circuit with very thin wire what effect might this have?
less current will flow as resistance is inversely proportional to area
What is effect of voltage and current by changing the length of wire?
By changing the length of wire, say reducing it, the resistance will drop and that will increase current flow but the voltage is less likely to change V=IR.
What slows the movement of electrons?
Insulators
How does width of the wire affect the flow of current in a wire?
it just does The thicker the wire the more space there will be for electrical current to flow. What this means is that the electrons have a lesser chance of hitting the atoms and causing resistance.
Some electrical appliances perform quite unsatisfactory when long extension cords are used Why?
Wire has resistance to current flow. The more wire the more resistance.
Why does more current flow through the bulb when the reed switch was replaced with copper wire?
Copper wire has apparently lower resistance than the reed switch. The lower electric resistance, the higher electric current.
What makes a current lower and generates more heat?
The resistance of the electrical conductor, eg a wire, reduces the current which can flow in the circuit. The remaining current which does flow generates heat, representing the electrical energy which has been lost in overcoming the resistance.
Can you explain electric current?
Current is the flow of electrons in a system usually taught from positive to ground or zero potential. It is defined by the formula current = voltage/resistance Everything has resistance - even wire.
What is the effect on current in a wire if both the voltage across it and its resistance are doubled?
it will cause a Short Circuit
What is the effect on the current in a wire if both the voltage across it and it's resistance are doubled?
By Ohm's Law, current is voltage divided by resistance, so if you double both the voltage and the resistance, the current would remain the same.
If you have a thick wire and small electricity what would happen?
the property of a wire to oppose the flow of current is called resistance and resistance is inversely proportional to A (area of cross-section of the wire). so, a small current also should be transferred without much loss.
Why does the diameter of a wire affect its resistance in terms of current being a flow of electrons?
Because its bigger, so more electrons can flow through
