If the area of a loop is doubled while keeping the magnetic field constant, how

Practice Questions

Q1
If the area of a loop is doubled while keeping the magnetic field constant, how does the magnetic flux change?
  1. It remains the same
  2. It doubles
  3. It triples
  4. It halves

Questions & Step-by-Step Solutions

If the area of a loop is doubled while keeping the magnetic field constant, how does the magnetic flux change?
  • Step 1: Understand the formula for magnetic flux, which is Φ = B * A, where Φ is the magnetic flux, B is the magnetic field, and A is the area.
  • Step 2: Identify that in this question, the magnetic field B is constant, meaning it does not change.
  • Step 3: Note that the area A is being doubled, which means if the original area is A, the new area will be 2A.
  • Step 4: Substitute the new area into the formula: Φ = B * (2A).
  • Step 5: Simplify the equation: Φ = 2 * (B * A). This shows that the new magnetic flux is double the original magnetic flux.
  • Step 6: Conclude that if the area is doubled while keeping the magnetic field constant, the magnetic flux also doubles.
  • Magnetic Flux – Magnetic flux (Φ) is the product of the magnetic field (B) and the area (A) through which the field lines pass, represented by the formula Φ = B * A.
  • Area and Magnetic Flux Relationship – The relationship between area and magnetic flux indicates that if the area is increased while the magnetic field remains constant, the magnetic flux will also increase proportionally.
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