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What happens to the magnetic field strength inside a long solenoid if the curren

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Question: What happens to the magnetic field strength inside a long solenoid if the current is doubled? (2021)

Options:

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

Correct Answer: It doubles

Exam Year: 2021

Solution: 

The magnetic field strength inside a solenoid is directly proportional to the current flowing through it. Therefore, doubling the current will double the magnetic field strength.

What happens to the magnetic field strength inside a long solenoid if the curren

Practice Questions

Q1
What happens to the magnetic field strength inside a long solenoid if the current is doubled? (2021)
  1. It remains the same
  2. It doubles
  3. It quadruples
  4. It halves

Questions & Step-by-Step Solutions

What happens to the magnetic field strength inside a long solenoid if the current is doubled? (2021)
  • Step 1: Understand what a solenoid is. A solenoid is a coil of wire that creates a magnetic field when electricity flows through it.
  • Step 2: Know that the magnetic field strength inside a solenoid depends on the current (the flow of electricity) passing through the wire.
  • Step 3: Remember the relationship: the magnetic field strength is directly proportional to the current. This means if you change the current, the magnetic field strength changes in the same way.
  • Step 4: If the current is doubled (increased by two times), the magnetic field strength will also double.
  • Step 5: Conclude that doubling the current results in doubling the magnetic field strength inside the solenoid.
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