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Chapter 21: Q25P (page 626)

How many electrons would have to be removed from a coin to leave it with a charge of +1.0×10−7C ?

Short Answer

Expert verified

The number of electrons to be removed is6.3×1011.

Step by step solution

01

The given data 

Charge of the coin, q=+1.00×10−7C

02

Understanding the concept of quantization of charge 

As we know that a charged particle emits energy in the form of packets, thus, the number of electrons emitted or present can be considered as multiple factors of the electronic charge.

Formula:

The number of electrons present, n=q/e (1)

03

Calculation of the number of electrons

Using the equation (1) and the given data, we can get the number of electrons removed from the coin as given:

n=1.00×10−7C1.60×10−19C=6.3×1011

Hence, the number of electrons removed is 6.3×1011

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Most popular questions from this chapter

In Fig. 21-26, particle 1 of charge +qand particle 2 of charge +4.00q are held at separation L=9.00cmon an x-axis. If particle 3 of charge q3 is to be located such that the three particles remain in place when released, what must be the (a) xand (b) ycoordinates of particle 3, and (c) the ratio q3/q?

The charges of an electron and a positron are -eand+e. The mass of each is9.11×10−31 kg.What is the ratio of the electrical force to the gravitational force between an electron and a positron?

In Fig. 21-25, four particles form a square. The charges areq1=+Q,q2=q3=q, andq4=-2.00Q. What is qQif the net electrostatic force on particle 1 is zero?

Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of 0.108Nwhen their center-to-center separation is50.0cm. The spheres are then connected by a thin conducting wire. When the wire is removed, the spheres repel each other with an electrostatic force of 0.0360N. Of the initial charges on the spheres, with a positive net charge, what were (a) the negative charge on one of them and (b) the positive charge on the other?

What must be the distance between point charge q1=26.0μc and point chargerole="math" localid="1661869629566" q2=-47.0μc for the electrostatic force between them to have a magnitude of 5.70 N ?
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