   Chapter 17, Problem 18P

Chapter
Section
Textbook Problem

The current supplied by a battery in a portable device is typically 0.15 A. Find the number of electrons passing through the device in one hour.

To determine
The number of electrons passing through the device in 1hour.

Explanation

Given Info: Current supplied by battery is 0.15A current existed for 1hour

Explanation:

Formula to calculate the number of electrons passing through the device is

I=qt

• I is the current flows through the device,
• q is the total charge flown,
• t is the time interval which current exists,

Formula to calculate the for the total charge flow is,

q=ne

• n is the number of electrons passed,
• e is the charge of an electron

Substitute the relation for total charge in equation for current and rewrite I

I=net

Substitute 0.15A for I , 1

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