Suppose an Emf Is Induced in a Loop of Wire

question 67

Multiple Choice

Suppose an emf is induced in a loop of wire by rotating the loop in a magnetic field. If the diameter of the loop were twice as large, how would the induced emf compare?

• A) The induced emf would be 4 times as much.
• B) The induced emf would be twice as much.
• C) There would be no change in the induced emf.
• D) The induced emf would be 6.28 times as much.

---

Definitions:

Piaget's Conservation Task

Piaget's Conservation Task is a cognitive exercise used by psychologist Jean Piaget to assess a child's ability to understand that quantities remain constant despite changes in shape or arrangement.

Reversibility

A mental operation in which a child realizes that one operation can be negated, or reversed, by the effects of another.

Reversibility

The cognitive ability to understand that actions can be reversed, returning to the original state.

Mental Operation

Cognitive processes that involve manipulating information mentally, such as reasoning, problem-solving, and decision-making.