Question

Heating effect of electric current does not observed it
a)electric oven
b) electric iron
c) electric motor

Answer 1

The heating effect of electric current is observed in all of the appliances that are mentioned here.

All of these appliances are heating appliances which are meant to facilitate different purposes.

Here all the appliances convert electric energy to heat energy and thus it is inevitable for them not to radiate heat.

Answer 2

In electric motor the heating effect of ‘electric current’ does not observed.

Option: (c)

Explanation:  

• When a ‘large amount of electric current’ is passed through a resistance wire the ‘electrical energy’ is converted into heat energy.  

• The amount of heat is ‘directly proportional to the amount of electricity’ flowing through the resistant wire and the amount of resistance present in the wire.  

• Electric oven and electric iron work on the ‘principle of generation’ of heat when a ‘large amount of current’ is passed through a wire having a large resistance.  

• However ‘electric motor’ works on the principle of experiencing a torque when a current carrying wire is placed in a ‘magnetic field’.

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