Question

What are three effects of electric current

Answer 1

- magnetic effecf

- chemical effect

- electric effect

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Answer 2

Three effects of an Electric Current

Heating Effect Demonstrate with an electric coil in beaker of water plus thermometer.

Magnetic Effect* Demonstrate with an electromagnet (connected up to source of electricity).

Chemical Effect Demonstrate with a voltameter (see below).

Relationship between Work, Current, Resistance and Time

W = I2Rt*

Now Power is defined as the rate at which work is done, i.e. Power = Work/time, so Power = I2R
This is known as Joule’s Law

P = I2R

Joules Law states that the rate at which heat is produced in a conductor is proportional to the square of the current, provided its resistant is constant.   

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