/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q21Q You take two invisible tapes of ... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 14: Q21Q (page 580)

You take two invisible tapes of some unknown brand, stick them together, and discharge the pair before pulling them apart and hanging them from the edge of your desk. When you bring an uncharged plastic pen withinof10CM either the U tape or the L tape you see a slight attraction. Next you rub the pen through your hair, which is known to charge the pen negatively. Now you find that if you bring the charged pen withinrole="math" localid="1655718752350" 8CMof the L tape you see a slight repulsion, and if you bring the pen withinrole="math" localid="1655718766744" 12CMof the U tape you see a slight attraction. Briefly explain all of your observations.

Short Answer

Expert verified

Thus, the uncharged pen is first attracted to the U and the L tape due to the concept of charging by induction, and when it got negatively charged after rubbing, then the pen got repulsed from the L tape as it is of negative charge and the pen got attracted to the U tape as it is of positive charge

Step by step solution

01

Significance of the law of attraction and charging by induction for the tapes and pen

The law of attraction states that the unlike charges attract each other and the like charges repel each other.

Charging by induction states that an uncharged particle can get charged if it is kept beside a charged particle.

The law of attraction and the charging by induction gives the reason for the attraction of the pen with the U and L tape.

02

Determination of the reason for the attraction and repulsion

As the invisible tape has been sticked together, then both the tapes have induced some charges. However, after discharging the tapes, the U tape has induced a positive charge and the L tape has induced a negative charge. So, when the uncharged pen is brought towards either the L tape or the U tape within a distance of, then the pen gets attracted towards the tapes and this is due to the reason that uncharged particles get attracted towards the changed one according to the concept of charging by induction.

As the pen is negatively charged after rubbing on hairs, then when it is brought to a distance oftowards the L tape which is negatively charged, a slight repulsion occurred due to the reason that like charges repel each other according to the law of attraction.

Now, when the negatively charged pen is brought at a distance oftowards the U tape which is positively charged, a slight attraction occurred due to the reason that unlike charges attract each other according to the law of attraction.

Thus, the uncharged pen is first attracted to the U and the L tape due to the concept of charging by induction, and when it got negatively charged after rubbing, then the pen got repulsed from the L tape as it is of negative charge and the pen got attracted to the U tape as it is of positive charge.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

A typical atomic polarizability is 1脳10-40C路ml(N/C). If theq in p=qsis equal to the proton charge e, what charge separation s could you produce in a typical atom by applying a large field of 3脳106N/C, which is large enough to cause a spark in air?

You rub a plastic comb through your hair and it now carries a charge of -4脳10-10C. What is the charge on your hair?

A large positive charge pulls on a distant electron. How does the net force on the electron change if a slab of glass is inserted between the large positive charge and the electron? Does the net force get bigger, smaller, or stay the same? Explain, using only labeled diagrams. (Be sure to show all the forces on the electron before determining the net force on the electron, not just the force exerted by the large positive charge. Remember that the part of the net force on the electron contributed by the large positive charge does not change when the glass is inserted: the electric interaction extends through matter.)

In a particular metal, the mobility of the mobile electrons is . At a particular moment the net electric field everywhere inside a cube of this metal isin thedirection. What is the average drift speed of the mobile electrons in the metal at this instant?

Explain briefly why the attraction between a point charge and a dipole has a different distance dependence for induced dipoles (1/r5 ) than for permanent dipoles (1/r3 ). (You need not explain either situation in full detail: just explain why there is this difference in their behavior.)
See all solutions

Recommended explanations on Physics Textbooks

Magnetism and Electromagnetic Induction

Read Explanation

Medical Physics

Read Explanation

Fluids

Read Explanation

Classical Mechanics

Read Explanation

Physical Quantities And Units

Read Explanation

Further Mechanics and Thermal Physics

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.