Calculate the inductance of an air core solenoid of length 400 cm, area of cross-section  and having 200 turns.

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SSC JE Electrical 06 Jun 2024 Shift 2 Official Paper - 1
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  1. 8 mH
  2. 10 H
  3. 8 H
  4. 0.08 H

Answer (Detailed Solution Below)

Option 1 : 8 mH
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Detailed Solution

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Concept

The inductance of an air core solenoid is given by:

where, L = Inductance

N = No. of turns

A = Area 

l = Length

Calculation

Given, N = 200 turns

A = 

l = 400 cm = 4 m

L = 8 mH

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