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What is the voltage across an electric water heater element that has a resistance of 32 ohms when the current through it is 6.8A?
Wiki User
∙ 12y ago
It is 6 times 8 and the answer is in volts.
Wiki User
∙ 9y ago
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What is meant by the resistance of an electrical component?
Think of it like this: Friction causes you difficulty in pulling heavy objects on a carpet. This frictional force is similar to electrical resistance. It is one of two ways to define how easily electricity will travel through an electrical element.
What happens when an electric current encounters resistance?
An electron traveling through the wires and loads of the external circuit encounters resistance.
What is the electrical resistance offered by a current-carrying element that produces a drop of one volt when a current of one ampere is flowing through it?
One ohm.
Does increasing the resistance increase the electric current?
If the current through a pure metallic conductor causes the temperature of that conductor to rise, then its resistance will increase. A practical example of this is an electric lamp. The cold resistance of a lamp is very much lower than the hot resistance.
What determines the actual magnitude and direction of current through voltage source?
The voltage itself will determine the direction of current (assuming there isn't another source pushing current through the source backwards); the amount of current will be determined by the thevenin equivalent resistance of the circuit connected to that source (the resistance "seen" by the source, which can be lumped into a single circuit element).
Why does the cord of an electric heater not glow while the heating element does?
The heating element of an electric heater is a "resistor", the cord which conducts the electricity is not. The resistance of the element of an electric heater is very high. As current flows through the heating element, it becomes red hot and glows. On the other hand, the resistance of the cord is low. It does not become red hot when current flows through it.
Where does matter charcoal go while burning?
graphite is a non metal and an element and because it is a weak conductor of electricity it lets electric current and heat flow through it and when electric current passes through it it faces resistance and glows.
How an electric iron works?
Basically you apply a voltage to a load (the iron's heating element) which induces a current. The current through the load generates heat according to the formula Power = Current^2 * Resistance.
In an electric circuit resistance is?
Resistance is the opposition to the flow of electric current through a conductor. It is defined as the ratio of the potential difference (volts) between the ends of the conductor to the magnitude of the current (amps) through the conductor.
What is the meaning of electrical resistance?
Definition Of Resistance In Electrical:Property of a material to oppose the flow of electric current through it is called Resistance.
When a current passes through a resistance what is the electric energy that is lost?
Becomes heat.
What is meant by the resistance of an electrical component?
Think of it like this: Friction causes you difficulty in pulling heavy objects on a carpet. This frictional force is similar to electrical resistance. It is one of two ways to define how easily electricity will travel through an electrical element.
How is electricity used in an electric iron?
Electric iron contains a resistance wire (nichrome) . When a current of I amp is passed through the wire, electrical energy equal to I^2Rt (joules) is produced which is entirely converted to heat. This is a unique characteristic of resistance element as compared to capacitors or inductors where there is no power dissipation. Here R = resistance of the wire in ohms and t= the amount of time that the current passes through the resistance wire. The metal base at the bottom of the electric iron is thus heated up.
When a current passes through a resistance what happens to the electric energy that is lost?
Becomes heat.
What happens when an electric current encounters resistance?
An electron traveling through the wires and loads of the external circuit encounters resistance.
Why does a heating element get hot when current flows?
The current is doing work against the resistance of the material which makes up the heating element.Because it has resistance.-- Whenever electric current flows through a resistance, it loses energyequal to (current-squared) x (resistance).-- When we connect components in an electrical circuit, we use wire withthe least possible resistance, so as not to lose energy in the wiring.-- When we want to warm up the lab, we use wire with significant resistance,in order to have it dissipate significant energy and radiate heat.
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.
