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Found in: Page 903

### Matter & Interactions

Book edition 4th edition
Author(s) Ruth W. Chabay, Bruce A. Sherwood
Pages 1135 pages
ISBN 9781118875865

# A magnetic field near the floor points up and is increasing. Looking down at the floor, does the non-Coulomb electric field clockwise or counter clockwise? A magnetic field near the ceiling points down and is decreasing. Looking up at the ceiling, does the non-Coulomb electric field curl clockwise or counter clockwise?

The floor and ceiling both are counter clockwise.

See the step by step solution

## Step 1: Given Information.

A magnetic field near the floor points up and is increasing.

## Step 2: Definition/ Concept.

The magnetic field's direction and the electric field's direction are opposite each other. The non-coulomb electric field curls in a clockwise manner as the magnetic field is increased downward toward the floor.

## Step 3: Find floor is clockwise or counter clock wise.

The figure will be:

The facts are:

(a). The magnetic field, B is pointing upwards.

(b). The magnetic field is increasing. Therefore, the quantity $dB/dt$ is pointing in the same direction as B.

So, by using the right hand thumb rule on $-dB/dt$, this can be observed that the direction of ${E}_{NC}$ is counter clockwise.

Therefore, the floor is counter clockwise.

## Step 4: Find ceiling is curl clockwise or counter clock wise.

The figure will be:

The facts are:

(a). The magnetic field, B is pointing upwards.

(b). The magnetic field is decreasing. Therefore, the quantity $dB/dt$ is pointing in the opposite direction as B.

So, by using the right hand thumb rule on $-dB/dt$, this can be observed that the direction of ${E}_{NC}$ is counter clockwise.

Therefore, the ceiling is counter clockwise.