What will the effect on heating if the resistance is decreased?

Here is the answer: If the resistance of a conductor is reduced to half its initial value, then the heating effect in the conductor will become half. When current transmit through a conductor, heat energy is generated in the conductor. A greater the resistance produces more heat.

Why does the temperature of a fuse wire rises much faster than the connecting copper wires when an excessive current flows through it?

We use a thin wire in a fuse because it has a much greater resistance than the rest of connecting wires. Due to its high resistance, the heating effect of current will be much more in the fuse wire than anywhere else in the circuit.

Which appliance works on heating effect of electric current?

The devices which work on this property of heating effect are electric heater, electric iron, electric fuse, etc. In an electric heater and an electric iron, we have coils of the conducting materials which has the property of producing heat when electric current is passed through them.

What is heating effect of electric current list two electrical appliances which work on this effect?

Heating effect of electric current I, through a conductor of resistance, R for a time, t is given by H = I2Rt. This equation is called the Joule’s equation of electrical heating. It quantifies the heating effect of electric current. Two appliances which work on this effect are electric heater and electric toaster.

How does resistance affect heat?

Heating a metal conductor makes it more difficult for electricity to flow through it. These collisions cause resistance and generate heat. Heating the metal conductor causes atoms to vibrate more, which in turn makes it more difficult for the electrons to flow, increasing resistance.

Does a fuse have high resistance or low resistance?

Fuse has low resistance with comparison to the load resistance of the circuit but has high resistance when compared to the wire of same length. Thus when asked weather a fuse has high resistance or low resistance, we should answer that a fuse has high resistance with low melting point.

Does a fuse wire have low resistance or high resistance?

As a high amount of current is passing, resistances of the fuse wire have to be large due to which the heat produced will be high and it is broken down immediately. Hence, fuse wire is a wire of high resistance and low melting point.

What is the difference between electric resistance heating and resistance heating?

Resistance heating involves use of a high-quality energy for a low-grade process, and it would be preferable to employ heat pumps, which use electricity efficiently for heating purposes. Electric resistance heating uses the Joule effect to heat the blanks.

Why does a lower resistance wire produce more heat?

Lower resistance will produce more heat because more current flows. It’s fair to be confused. In the same forum a subsequent reader explains why house wiring under normal loads would not overheat. In the Heating element example you are assuming that the wire is the only resistance in the circuit and therefore all the voltage is felt across it.

Does a heating element need to have high resistance?

You might think a heating element would need to have a really high resistance—after all, it’s the resistance that allows the material to generate heat. But that’s not actually the case. What generates heat is the current flowing through the element, not the amount of resistance it feels.

What are the disadvantages of resistive heating?

In other cases, resistive heating may be undesirable. Power lines are a classic example. For one, their purpose is to transmit energy, not to dissipate it; the energy converted to heat along the way is, in effect, lost (thus the term resistive losses).