Correct option is D
Correct Answer:D. Heating Effect
Explanation:
Electric devices such as laundry irons, electric toasters, ovens, kettles, and heaters work on the heating effect of electric current. This effect occurs when an electric current passes through a conductor, causing it to resist the flow of electrons and produce heat.
Key Points:
- Joule’s Law of Heating: The heat (H) produced in a conductor is given by:
H=I2Rt
where:
- I = current
- R = resistance of the conductor
- t = time duration
- Applications in Devices:
- Electric iron and toaster: Convert electrical energy into heat to perform tasks like ironing clothes and toasting bread.
- Electric oven and kettle: Use heating elements to cook food or boil water.
- Electric heater: Generates heat to warm spaces.
Other Options:
- Chemical Effect: Observed in processes like electrolysis, not relevant to these devices.
- Magnetic Effect: Involves the creation of a magnetic field around a current-carrying conductor, used in motors or transformers, not heating devices.
- Physiological Effect: Relates to the effect of electric current on the human body, not applicable here.