A fixed conducting ring of radius a and resistance R lies in a perpendicular field B(r,t)=B₀+λtr². Self-inductance is negligible. Which statements are correct?

Select all that apply

• Option A

  Using only the field value at the circumference to calculate flux is generally incorrect.

• Option B

  The flux must be integrated over the enclosed area.

• Option C

  The induced-current magnitude is time-independent.

• Option D

  The Joule-heating rate is time-independent.