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Solution


Q.

The difference of temperature in a material can convert heat energy into electrical energy. To harvest the heat energy, the material should have          [2025]
1 low thermal conductivity and low electrical conductivity  
2 high thermal conductivity and high electrical conductivity  
3 low thermal conductivity and high electrical conductivity  
4 high thermal conductivity and low electrical conductivity  

Ans.

(3)

Material should have low thermal conductivity and high electrical conductivity.