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Chapter 23: Q3PE (page 860)

Referring to figure a, what is the direction of the current induced in coil 2.

  1. If the current in coil 1 increases?
  2. If the current in coil 1 decreases?
  3. If the current in coil 1 is constant?

Explicitly show how you follow the steps in the Problem-Solving Strategy for Lenz's Law.

Short Answer

Expert verified
  1. The current coil 1 increases the direction of the coil is counterclockwise.
  2. The current coil 1 decreases the direction of the coil is clockwise.
  3. The current in coil 1 is constantthere is no current induced.

Step by step solution

01

Concept Introduction

If we wrap our right hand with the fingers pointing in the direction that the current flows in the loop that is, counter-clockwise the thumb will point in the direction of the magnetic field, according to the right-hand rule.

02

Current increases(a)

The induced current, according to Lenz's law, opposes the change in magnetic flux that caused it. Because the current in loop 1 is increasing in this example, the induced current in loop 2 will be set to counteract the flux rise. The direction of the induced current is counter-clockwise, according to the right-hand rule.

03

Current decreases(b)

Because the current in loop 1 is dropping in this situation, the induced current in loop 2 will be such that it counteracts the flux decrease. The direction of the induced current is clockwise, according to the right-hand rule.

04

Current is constant(c)

There will be no current induced in loop 2. since there is no change in current in loop l.

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