5. What factors does the amount of heating in an electric conductor by an electric current
depend on? Write two practical applications of the heating effect of current
Answers
Step-by-step explanation:
When current flows through a conductor, heat energy is generated in the conductor. The heating effect of an electric current depends on three factors:
The resistance, R of the conductor. A higher resistance produces more heat.
The time, t for which current flows. The longer the time the larger the amount of heat produced
The amount of current, I. the higher the current the larger the amount of heat generated.
Hence the heating effect produced by an 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.
Electrical energy and power
The work done in pushing a charge round an electrical circuit is given by w.d = VIt
So that power, P = w.d /t = VI
The electrical power consumed by an electrical appliance is given by P = VI = I2R = V2/R
Answer:
The heating effect of an electric current depends on three factors: The resistance, R of the conductor. A higher resistance produces more heat. The time, t for which current flows.The heating effect of electric current is used in the following applications: Electric Bulb: In an electric bulb, the filament of bulb gives light because of heating effect of electricity. ... Electric iron: The element of electric iron is made of alloys having high melting point.
Step-by-step explanation:
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