railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) General Science Chemistry Periodic Table

ଏକ ବୈଦୁତିକ ଲୁହାରେ ଥିବା ହିଟର ଉପାଦାନ କେଉଁଥିରେ ତିଆରି :

1
ନିକ୍ରୋମ୍ 
2
ଟଙ୍ଗଷ୍ଟେନ୍ 
3
ତମ୍ବା 
4
ଲୁହା 

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