Answers

2014-08-09T16:02:01+05:30
A material or an object that does not easily allow heat, electricity, light, or sound topass through it. Air, cloth and rubber are good electrical insulators; feathers and wool make good thermal insulators.
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sound passes through insulators
light passes through insulators
2014-08-09T16:11:53+05:30
Insulators are the materials which does not allow the electricity through them 
eg:wood 
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