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In a solenoid, what happens to the magnetic field strength if the number of turn

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Question: In a solenoid, what happens to the magnetic field strength if the number of turns is doubled while keeping the current constant?

Options:

  1. It doubles
  2. It halves
  3. It remains the same
  4. It quadruples

Correct Answer: It doubles

Solution: 

The magnetic field strength inside a solenoid is directly proportional to the number of turns per unit length, so doubling the turns doubles the magnetic field strength.

In a solenoid, what happens to the magnetic field strength if the number of turn

Practice Questions

Q1
In a solenoid, what happens to the magnetic field strength if the number of turns is doubled while keeping the current constant?
  1. It doubles
  2. It halves
  3. It remains the same
  4. It quadruples

Questions & Step-by-Step Solutions

In a solenoid, what happens to the magnetic field strength if the number of turns is doubled while keeping the current constant?
  • Step 1: Understand what a solenoid is. A solenoid is a coil of wire that creates a magnetic field when an electric current passes through it.
  • Step 2: Know that the magnetic field strength inside a solenoid depends on two things: the amount of current flowing through the wire and the number of turns of the wire.
  • Step 3: Remember that the magnetic field strength is directly proportional to the number of turns per unit length. This means that if you increase the number of turns, the magnetic field strength increases.
  • Step 4: If you double the number of turns while keeping the current the same, you are increasing the number of turns per unit length.
  • Step 5: Since the magnetic field strength is directly proportional to the number of turns, doubling the number of turns will also double the magnetic field strength.
  • Magnetic Field in a Solenoid – The magnetic field strength inside a solenoid is directly proportional to the number of turns per unit length and the current flowing through it.
  • Proportional Relationships – Understanding how changes in one variable (number of turns) affect another variable (magnetic field strength) in a proportional relationship.
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