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What happens to the magnetic field inside a long solenoid when the current throu

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Question: What happens to the magnetic field inside a long solenoid when the current through it is increased?

Options:

  1. Magnetic field decreases
  2. Magnetic field remains constant
  3. Magnetic field increases
  4. Magnetic field becomes zero

Correct Answer: Magnetic field increases

Solution: 

The magnetic field inside a long solenoid is directly proportional to the current flowing through it. Increasing the current increases the magnetic field strength.

What happens to the magnetic field inside a long solenoid when the current throu

Practice Questions

Q1
What happens to the magnetic field inside a long solenoid when the current through it is increased?
  1. Magnetic field decreases
  2. Magnetic field remains constant
  3. Magnetic field increases
  4. Magnetic field becomes zero

Questions & Step-by-Step Solutions

What happens to the magnetic field inside a long solenoid when the current through it is increased?
  • Step 1: Understand what a solenoid is. A solenoid is a long coil of wire that creates a magnetic field when electricity flows through it.
  • Step 2: Know that the magnetic field is the area around the solenoid where magnetic forces can be felt.
  • Step 3: Recognize that the strength of the magnetic field inside the solenoid depends on the amount of electric current flowing through the wire.
  • Step 4: Learn that 'directly proportional' means that if one thing increases, the other thing also increases.
  • Step 5: When the current through the solenoid is increased, the magnetic field strength inside the solenoid also increases.
  • Step 6: Conclude that more current means a stronger magnetic field inside the solenoid.
  • Magnetic Field in a Solenoid – The magnetic field inside a long solenoid is determined by the formula B = μ₀(nI), where B is the magnetic field, μ₀ is the permeability of free space, n is the number of turns per unit length, and I is the current.
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