Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JIPMER 2006
Exam
JIPMER
Year
2006
Subject
Physics
Chapter
Current Electricity

JIPMER 2006 · Physics · Current Electricity

A uniform wire of length l and having resistance R is cut into n...

A uniform wire of length ll and having resistance RR is cut into nn equal parts and all parts are connected in parallel, then the equivalent resistance will be :

Options

  1. ARR
  2. BR/nR / n
  3. CR/n2R / n^2
  4. Dn2Rn^2 R

Correct answer

C. R/n2R / n^2

Step-by-step solution

Resistance of each part R′=RnR^{\prime}=\frac{R}{n} When, these parts are connected in parallel. Then, 1R′′=1R′+1R′….n\frac{1}{R^{\prime \prime}}=\frac{1}{R^{\prime}}+\frac{1}{R^{\prime}} \ldots . n time =nR′∴R′′=R′n=Rn2\begin{aligned} & =\frac{n}{R^{\prime}} \\ \therefore \quad R^{\prime \prime} & =\frac{R^{\prime}}{n}=\frac{R}{n^2}\end{aligned}
Practice Current Electricity on Quantrex Academy →

More from Current Electricity

A potentiometer wire of 400\ cm length has a resistance of 20\ Ω . It is connected in… MHT CET Medical 2026In the following figure current I equal to MHT CET Medical 2026The range of voltmeter is 10\ V and its resistance is 50\ Ω . To convert it to a… MHT CET Medical 2026When a galvanometer is shunted with a 2\ Ω resistance, the deflection is reduced to… MHT CET Medical 2026A galvanometer can be converted into a voltmeter of certain range by connecting a… MHT CET Medical 2026A resistance is to be measured using a meter bridge; the student chooses the standard… MHT CET Medical 2026Which of the following statements is FALSE? A. In a balanced Wheatstone bridge, if the… MHT CET Medical 2026A potentiometer wire has length 4 m and resistance 8\ Ω . The resistance that must be… MHT CET Medical 2026 Full Current Electricity list All JIPMER PYQs