Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • The cost of 5 Rs/KWh of operating an electric motor for 9 hours takes 8 amp at 115 v is.Option: 1 30 Rs<div class='qna-option

The cost of 5 Rs/KWh of operating an electric motor for 9 hours takes 8 amp at 115 v is.

Option: 1

30 Rs


Option: 2

41 Rs


Option: 3

32 Rs


Option: 4

36 Rs


Answers (1)

best_answer


\text { 1 watt }=1 \mathrm{~J} / \mathrm{sec} \\
1 \mathrm{KWh}=\frac{V \times I \times t}{1000} \text { (in~hr) } \\
\text { Total KWh } =10^{-3} \times 115 \times 9 \times 8 \\
=8.28
\text { Total Cost }=8.28 \times 5 \\
=41.4 \text { Ruppees }
 

Posted by

Gautam harsolia

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

BTech Admission 2025 Live: JEE Mains, SRMJEEE, MET registrations underway; MHT CET syllabus updates
anam-khan

Centre issues coaching guidelines, prohibits centres from using false claims like '100% selection'
anam-khan

BTech Admissions 2025 Live: JEE Mains, SRMJEE, VITEEE dates out; AEEE, MET registrations underway

Latest Question