When a Current Is Induced by a Changing Magnetic Field

question 11

Multiple Choice

When a current is induced by a changing magnetic field B₁, the current always produces a second magnetic field B₂ such that

• A) B₁ and B₂ completely cancel each other out.
• B) B₁ and B₂ combine to give a stronger magnetic field than B₁ alone.
• C) B₁ and B₂ combine to give a weaker magnetic field than B₁ alone.
• D) It is not possible to tell whether the combined field is stronger or weaker than B₁ without knowing how B₁ is changing.

---

Definitions:

Illusory Contract

A contract that appears to be binding but does not actually commit one or more parties to an actionable obligation.

Defame

To damage someone's reputation through false or unjustified statements.

Preexisting Obligation

An obligation that already exists before a certain action is taken or an agreement is made, often relevant in contract law.

Under Seal

denotes a formal legal process or document that has been officially sealed, indicating confidentiality or authenticity.