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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脳10鈭�7C ?

Short Answer

Expert verified

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

Step by step solution

01

The given data 

Charge of the coin, q=+1.00脳10鈭�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脳10鈭�7C1.60脳10鈭�19C=6.3脳1011

Hence, the number of electrons removed is 6.3脳1011

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Most popular questions from this chapter

Question: In Fig. 21-40, four particles are fixed along anxaxis, separated bydistances -2.00. The charges areq1=+2e,q2=-e,q3=+e,andq4=+4e, withe=1.60脳10-19C. In unit-vector notation, what is the net electrostatic force on (a) particle 1 and (b) particle 2 due to the other particles?

Question: (a) Explain what happens to the balls of Problem 42 if one of them is discharged (loses its charge qto, say, the ground). (b) Find the new equilibrium separation x, using the given values of Land mand the computed value of |q|.

Three particles are fixed on an x-axis. Particle 1 of charge q1 is at x=-a, and particle 2 of charge q2is at x=+a. If their net electrostatic force on particle 3 of charge -Qis to be zero, what must be the ratio q1 /q2when particle 3 is at (a)x=+0.500a and (b) x=+1.50a?

Figure 21-14 shows two charged particles on an axis. The charges are free to move. However, a third charged particle can be placed at a certain point such that all three particles are then in equilibrium. (a) Is that point to the left of the first two particles, to their right, or between them? (b) Should the third particle be positively or negatively charged? (c) Is the equilibrium stable or unstable?

Question: In Fig. 21-41, three identical conducting spheres form an equilateral triangle of side length d=20.0 cm. The sphere radii are much smaller thand, and the sphere charges are, qA=-2.00nC,qB=-4.00nC,andqc=+8.00nC.

(a) What is the magnitude of the electrostatic force between spheresAandC?

The following steps are then taken:AandBare connected by a thin wire andthen disconnected;Bis grounded by the wire, and the wire is then removed;BandCare connected by the wire and then disconnected. What now are the magnitudes of the electrostatic force (b) between spheresAandCand (c) between spheresBandC?
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