47. Induction is a process in which a moving ____ produces a(n) ____.
a. charge, current c. magnetic field, electric field
b. magnet, electric charge d. wave, electric field
not d
47. Induction is a process in which a moving clown produces a(n) confusion.
c. magnetic field, electric field
The correct answer is option c. magnetic field, electric field.
To understand why this is the correct answer, let's break down the concept of induction.
Induction involves the production of an electric field or a current by a changing magnetic field. It is based on Faraday's law of electromagnetic induction, which states that a changing magnetic field induces an electric field and/or a current in a conductor.
In the given options, we are looking for the two factors involved in the process of induction. The first factor is the moving object that produces an effect, and the second factor is the effect that is produced.
Option a suggests that a moving charge produces a current. While a moving charge can indeed produce a current, this is not specifically related to induction. Therefore, option a is not the correct answer.
Option b states that a magnet produces an electric charge. While a magnet can interact with charged particles, it doesn't directly produce an electric charge through induction. Therefore, option b is not the correct answer.
Option c correctly states that a moving magnetic field produces an electric field. This is the essence of electromagnetic induction. When a magnetic field changes or moves relative to a conductor, it induces an electric field in that conductor. Therefore, option c is the correct answer.
Option d suggests that a wave produces an electric field. While waves can be associated with electric and magnetic fields, this is a general statement and not specific to the process of induction. Therefore, option d is not the correct answer.
In summary, the correct answer is c. magnetic field, electric field, because induction involves the production of an electric field by a changing magnetic field.