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BITSAT 2010
Exam
BITSAT
Year
2010
Subject
Physics
Chapter
Electromagnetic Induction

BITSAT 2010 · Physics · Electromagnetic Induction

Two solenoids of same cross-sectional area have their lengths and...

Two solenoids of same cross-sectional area have their lengths and number of turns in ratio of 1: 2. The ratio of self-inductance of two solenoids is

Options

  1. A1: 1
  2. B1: 2
  3. C2: 1
  4. D1: 4

Correct answer

B. 1: 2

Step-by-step solution

From L=μ0N2A1αN21L=\frac{\mu_{0} N^{2} A}{1} \alpha \frac{N^{2}}{1} we get, L1L2=(1/2)21/2=12\frac{\mathrm{L}_{1}}{\mathrm{ L}_{2}}=\frac{(1 / 2)^{2}}{1 / 2}=\frac{1}{2}
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