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42. Observe the diagram and ansewr the following questions:a) What is the significance of of this symbol.b) Write the effect of electric current.c) State two conclusions drawn from this phenomenon.

Answer»

the symbol is of a rheostat or variable resistanceHeating Effect Demonstrate with an electric coil in beaker of water plus thermometer.

Magnetic Effect* Demonstrate with an electromagnet

Chemical Effect

tq so much



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