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4th Edition

James Stewart

Publisher: Cengage Learning

ISBN: 9781337687805

Chapter 3.8, Problem 19E

(a)

To determine

**To find:** The magnitude of current when the value of time is given as

Expert Solution

Therefore, the current when time

**Given:**

The quantity of charge

The unit of current is in amperes (A).

**Calculation:**

Differentiate the equation (1) as below.

Calculate the current when

Substitute the value of

Therefore, the magnitude of current when time

(b)

To determine

**To find:** The magnitude of current when the value of time is given as

Expert Solution

The current when time

The current is lowest at the time equal to

Calculate the current when time

Substitute the value

Therefore, the current when

Calculate at what time the current is lowest.

The current is lowest when the

Differentiate

Equating the

When the value of time

Substituting the value of

When the value of time

Substituting the value

Therefore, the current is lowest at the time