Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 10 Answered

Please tell  
question image
Asked by riyamaths | 30 May, 2018, 07:16: PM
answered-by-expert Expert Answer
Let RA be the resistance of wire-A and is given by
 
begin mathsize 12px style R subscript A equals rho fraction numerator L over denominator pi cross times r squared end fraction end style..................................(1)
where ρ is resitivity, L is length and r is radius.
 
Let RB be the resistance of wire-B and it is given by
 
begin mathsize 12px style R subscript B equals rho fraction numerator 2 L over denominator pi cross times 4 cross times r squared end fraction space equals R subscript A over 2 end style
Equivalent resistance Req of parallel combinaion is given by
begin mathsize 12px style R subscript e q end subscript equals space fraction numerator R subscript A cross times R subscript B over denominator R subscript A plus R subscript B end fraction space equals space fraction numerator R subscript A cross times begin display style R subscript A over 2 end style over denominator R subscript A plus begin display style R subscript A over 2 end style end fraction space equals space R subscript A over 3 end style
hence the required ratio is 1/3

Answered by Thiyagarajan K | 31 May, 2018, 12:33: PM
CBSE 10 - Physics
Asked by shrilakshmimunoli | 01 Mar, 2024, 01:15: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
Asked by khajannirwan | 27 Feb, 2024, 10:20: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
Asked by sailakshmi.avinesh | 13 Feb, 2024, 07:03: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
Asked by sakshikatewa0 | 08 Feb, 2024, 12:48: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
Asked by saanviyadla | 24 Jan, 2024, 07:06: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
Asked by kamalaranjanmohantymohanty5 | 06 Jan, 2024, 10:05: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
Asked by saritavishwakarma1986 | 04 Jan, 2024, 12:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
Asked by nandanagnair | 17 Dec, 2023, 03:44: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
Get Latest Study Material for Academic year 24-25 Click here
×