Predicting the Motion of Charges on Objects that Interact with Conduction

  • 1.

    A conducting sphere is given with a positive charge of {eq}8\ \rm C {/eq}. If this conducting sphere come in contact with a neutral sphere then determine the final charge on the neutral sphere.

    Answers:

    • The neutral sphere will have a charge of {eq}-8\ \rm C {/eq}.

    • The neutral sphere will have a charge of {eq}4\ \rm C {/eq}.

    • The neutral charge will have a charge of {eq}-4\ \rm C {/eq}.

    • The neutral sphere will have a charge of {eq}8\ \rm C {/eq}.

  • 2.

    Body A and body B is charged with an equal amount of negative charges. If both bodies come into contact after the charging then how much charge body A will have? Assume body A has a larger area than body B.

    Answers:

    • Body A will have more charge than body B because A has a larger area.

    • Body B will have more charge than body A because of the smaller area.

    • Body A will have more charge than body B because A has a smaller area.

    • Both bodies A and B will have the same amount of charge.

  • 3.

    A positively charged rod is brought in contact with a neutral sphere, what will be the final charge gained by the neutral sphere after the contact?

    Answers:

    • Both the sphere and the rod will remain neutral.

    • The sphere will become positively charged.

    • The sphere will become negatively charged.

    • No charge transfer between the rod and the sphere will take place.

  • 4.

    If an uncharged body is brought in contact with a negatively charged plate, then the final charge obtained by the uncharged body will be equal to which of the following?

    Answers:

    • The uncharged body becomes positively charged after the contact.

    • The uncharged body becomes negatively charged after the contact.

    • The uncharged body remains neutral after the contact.

    • No charges flow between the bodies.

  • 5.

    What will be the final charge on a neutral plate when it is brought in contact with a positively charged body?

    Answers:

    • The plate will become negatively charged by losing electrons.

    • The plate will become positively charged by losing electrons.

    • The plate will become negatively charged by gaining electrons.

    • The plate will become positively charged by gaining electrons.

  • 6.

    A charged sphere of magnitude {eq}9\ \rm C {/eq} is touched with a neutral body. Determine the final amount of charge obtained by the neutral body.

    Answers:

    • The charged sphere will have a charge of {eq}9\ \rm C {/eq}.

    • Both the bodies will have a charge of {eq}4.5\ \rm C {/eq}.

    • The neutral body will obtain a charge of {eq}9\ \rm C {/eq}.

    • The neutral body will have a charge of {eq}4.5\ \rm C {/eq} and the charge on the charged body will become zero.

  • 7.

    Find the direction in which the charges will move if a negatively charged conductor is touched by a neutral conductor.

    Answers:

    • The negative charges move from the charged conductor to the neutral conductor.

    • The negative charges move from the neutral conductor to the charged conductor.

    • The positive charges move from the charged conductor to the neutral conductor.

    • The neutral conductor becomes negatively charged while the charged conductor becomes neutral.

  • 8.

    Jacky places a positively charged rod having a charge of {eq}Q {/eq} over a neutral plate. Determine the final charge obtained by the conductors.

    Answers:

    • Both the conductors will have a charge of {eq}Q/3 {/eq}.

    • Both the conductors will have a charge of {eq}Q {/eq}.

    • Both the conductors will have a charge of {eq}Q/2 {/eq}.

    • Both the conductors will have a charge of {eq}Q/4 {/eq}.

  • 9.

    Specify the direction of motion of charges, if a negatively charged body come into contact with an electrically neutral object.

    Answers:

    • The charge transfer between a charged body and a neutral body is not possible.

    • The electrons lost by the charged body will be gained by the neutral body.

    • The charged body will lose all its electrons to the neutral body.

    • The charged body will retain its charges while the neutral body remains neutral.

  • 10.

    Which of the given statements correctly explains the motion of charges between a negatively charged object and a neutral object due to conduction.

    Answers:

    • The negatively charged object gains more negative charges from the neutral object making it electro-negative.

    • The negatively charged object gains more positive charges from the neutral object making it electro-positive.

    • The neutral object will only draw positive charges from the negatively charged body.

    • The neutral object gains negative charges from the negatively charged body.

  • 11.

    An uncharged plate is placed on a wooden table another positively charged plate having a charge of {eq}7\ \rm C {/eq} is placed over the uncharged plate. Determine the final charge on the uncharged plate.

    Answers:

    • The uncharged plate will have a charge of {eq}2.5\ \rm C {/eq}.

    • The uncharged plate will have a charge of {eq}3.5\ \rm C {/eq}.

    • The uncharged plate will have a charge of {eq}6\ \rm C {/eq}.

    • The uncharged plate will have a charge of {eq}7\ \rm C {/eq}.

  • 12.

    Two bodies of different sizes and having an equal amount of negative charges come in contact with each other. Predict the motion of negative charges between the bodies after the contact has been made.

    Answers:

    • The charges do not travel between the bodies as they have an equal amount of charges.

    • Predicting the motion of charges is not possible

    • The negative charges travel from the smaller body to the larger body.

    • The negative charges travel from the larger body to the smaller body.

  • 13.

    A metal rod of charge {eq}-9\ \rm C {/eq} come into contact with an identical neutral rod resting on an insulating plane. Determine the final charge on the neutral rod.

    Answers:

    • The final charge on the neutral rod will be {eq}-4.5\ \rm C {/eq}.

    • The final charge on the neutral rod will be {eq}9\ \rm C {/eq}.

    • The final charge on the neutral rod will be {eq}-9\ \rm C {/eq}.

    • The final charge on the neutral rod will be {eq}4.5\ \rm C {/eq}.

  • 14.

    Determine the final charge on a neutral metal sphere if an identical positive charged body is touched with the neutral sphere. Take the charge to be {eq}15\ \rm C {/eq}.

    Answers:

    • The final charge will be equal to {eq}7.0\ \rm C {/eq}.

    • The final charge will be equal to {eq}-7.0\ \rm C {/eq}.

    • The final charge will be equal to {eq}-7.5\ \rm C {/eq}.

    • The final charge will be equal to {eq}7.5\ \rm C {/eq}.

  • 15.

    In which direction the charges will move if an uncharged metal plate is placed upon a negatively charged plate?

    Answers:

    • The charges will not travel from the uncharged plate to the charged plate.

    • The charges will travel from the charged plate to the uncharged plate.

    • The charges will travel from the uncharged plate to the charged plate.

    • The charges will not travel from the charged plate to the charged plate.

  • 16.

    The charge on a body is equal to {eq}-Q/4\ \rm C {/eq}. When this charged body is touched by an identical neutral body, calculate the final amount of charge accumulated by the neutral body.

    Answers:

    • The neutral body will have a charge of {eq}-Q/6 {/eq}.

    • The neutral body will have a charge of {eq}-Q/8 {/eq}.

    • The neutral body will have a charge of {eq}-Q/10 {/eq}.

    • The neutral body will have a charge of {eq}-Q/4 {/eq}.

  • 17.

    Find the direction in which the charges will travel if a positively charged object is brought in contact with an uncharged object.

    Answers:

    • The charged body loses positive charges to the environment but not to the uncharged body.

    • The uncharged body gains a negative charge but it loses its positive charge.

    • The positive charges move from the charged body to the uncharged body.

    • The positive charges move from the uncharged body to the charged body.

  • 18.

    A negatively charged sphere of {eq}-12\ \rm C {/eq} charge is supported on an insulating stand. An uncharged rod is brought in contact with the charged sphere, what will be the final charge obtained by the uncharged rod?

    Answers:

    • The final charge obtained by the uncharged rod will be equal to {eq}-12\ \rm C {/eq}.

    • The final charge obtained by the uncharged rod will be equal to {eq}12\ \rm C {/eq}.

    • The final charge obtained by the uncharged rod will be equal to {eq}6\ \rm C {/eq}.

    • The final charge obtained by the uncharged rod will be equal to {eq}-6\ \rm C {/eq}.

  • 19.

    A positively charged body has {eq}Q/2\ \rm C {/eq} of charges. When the charged body come into contact with an uncharged body, what will be the final amount of charges accumulated by the uncharged body?

    Answers:

    • The uncharged body will accumulate a charge of {eq}Q\ \rm C {/eq}.

    • The uncharged body will accumulate a charge of {eq}Q/2\ \rm C {/eq}.

    • The uncharged body will accumulate a charge of {eq}Q/4\ \rm C {/eq}.

    • The uncharged body will accumulate a charge of {eq}Q/6\ \rm C {/eq}.

  • 20.

    Which of the given choices will be correct for predicting the motion of charges between a charged body and a neutral body due to conduction.

    Answers:

    • The charged body will be left with a maximum amount of charges while the neutral body will have a low amount of charges.

    • Predicting the motion of charges between them is actually not possible.

    • The total charge on the charged body will be equally distributed between the neutral and the charged body.

    • The neutral body will gain a maximum of the charges leaving the charged body with a low amount of charges.

  • 21.

    Ana is very curious to find the motion of charges between a neutral and a charged body. She decided to make contact with a negatively charged rod with a neutral metal sphere. What will Ana find after she makes the contact?

    Answers:

    • Ana observes that the negative charge from the charged rod moves to the neutral body making it negatively charged.

    • Ana observes that the positive charge from the charged rod moves to the neutral body making it positively charged.

    • Ana observes that the positive charge from the neutral sphere moves to the charged rod making it more positively charged.

    • Ana observes that the negative charge from the neutral sphere moves to the charged rod making it more negatively charged.

  • 22.

    A charge of {eq}-10\ \rm C {/eq} is transferred to body A, then it comes into contact with an electrically neutral body B. What will be the final charge observed on these bodies?

    Answers:

    • Body A will have a charge of {eq}-10\ \rm C {/eq} while body B will have a charge of {eq}-5\ \rm C {/eq}.

    • Both the bodies will have a charge of {eq}-10\ \rm C {/eq}.

    • The body A will have a charge of {eq}0\ \rm C {/eq} while body B will have a charge of {eq}-10\ \rm C {/eq}.

    • Both bodies will have a charge of {eq}-5\ \rm C {/eq}.

  • 23.

    What will be your observation if you touch a positively charged body to a neutral body?

    Answers:

    • Transfer of charges takes place from the neutral body to the charged body until the neutral body is completely drained of its charges.

    • Transfer of charges will continue indefinitely until they are in contact with each other.

    • Transfer of charges will take place from the charged to the neutral body until the charged body is completely drained of its charges.

    • Transfer of charges will take place from the charged body to the neutral body until both bodies become positively charged.

  • 24.

    An aluminum plate having a charge of {eq}16\ \rm C {/eq} is placed over a neutral metal strip. Calculate the final charge obtained by the aluminum strip by the process of conduction.

    Answers:

    • The aluminum strip will have a final charge of {eq}7\ \rm C {/eq}.

    • The aluminum strip will have a final charge of {eq}16\ \rm C {/eq}.

    • The aluminum strip will have a final charge of {eq}10\ \rm C {/eq}.

    • The aluminum strip will have a final charge of {eq}8\ \rm C {/eq}.

  • 25.

    Two metal spheres of different sizes are positively charged. If these spheres touch each other, then find which one will possess an excess of positive charges.

    Answers:

    • The larger sphere will have an excess of negative charge.

    • The smaller sphere will have an excess of positive charges.

    • Both the spheres will have an equal amount of charges.

    • The larger sphere will have an excess of positive charges.

  • 26.

    Determine the direction of motion of charges if a negatively charged body is brought in contact with a neutral body.

    Answers:

    • The neutral body will gain positive charges from the charged body.

    • The charged body will lose positive charges.

    • The positive charges move from the charged body to the neutral body.

    • The negative charges move from the charged body to the neutral body.

  • 27.

    Predict the final charge obtained by a neutral body, if the neutral body is touched with a negatively charged rod.

    Answers:

    • The neutral body will become negatively charged.

    • The charge transfer between the bodies will not happen.

    • The neutral body tends to remain neutral after the contact.

    • The neutral body will become positively charged.

  • 28.

    An uncharged circular body is touched with a positively charged rod. Find the final charge gained by the uncharged body after the contact.

    Answers:

    • It remains neutral.

    • It becomes negatively charged.

    • It becomes positively charged.

    • It becomes negatively charged for some time and then it becomes positively charged.

  • 29.

    Alma takes a positively charged rod and connects the charged rod with a neutral metal sphere. Determine Alma's observation of the final charge accumulated on the metal sphere.

    Answers:

    • Alma observes that the metal sphere becomes positively charged after the contact.

    • Alma observes that the metal sphere still remains neutral after the contact.

    • She was not able to determine the motion of charges.

    • Alma observes that the metal sphere becomes negatively charged after the contact.

  • 30.

    A metal sphere A is charged with a negative charge of {eq}-12\ \rm C {/eq}. If sphere A is brought to contact with a neutral sphere N then find the final charge observed on the sphere N.

    Answers:

    • Both the spheres will have an equal amount of negative charges i.e. {eq}-12\ \rm C {/eq}.

    • The sphere N will have {eq}-6\ \rm C {/eq} of charge.

    • The sphere N will have {eq}-12\ \rm C {/eq} of charge.

    • The sphere N will have {eq}+6\ \rm C {/eq} of charge.

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