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What electrical charges do two balloons have if they repel each other?

(1 point)
• positive and negative
• Both are neutral in charge
• positive and positive
• negative and neutral

9 answers

If two balloons repel each other, they must have the same type of electrical charge. Therefore, the correct answer is:

• positive and positive

or

• negative and negative

Since the answer choices do not explicitly include both types of charges for repulsion, it suggests that they could both be positive or both be negative, but not specifically stated. If you had to choose from the given options, you would infer that both are the same charge type (either both positive or both negative) since they repel each other.

A scientist wipes a rubber rod with a wool cloth which leads to a negative charge on the rod. After this, the scientist touches the rod to a neutral metal sphere. This will transfer the negative charges from the rod to the sphere:
Charged Rubber Rod
Metal Sphere
Insulating Plastic Stand
Which statement explains what will happen to the negative charge, and why?
(1 point)
It will slowly move to the bottom of the sphere, because the charges are heavy and will sink to the bottom.
O It will spread uniformly over the surface of the sphere, because of the conducting nature of
the sphere and similar charges push away from each other.
• ligarealy spread to the air around the sphere, because negative charges need to eccupy a
It will remain only on one spot of the sphere, because the low conductivity of the metal prevents the charges from spreading out.

The correct statement explaining what will happen to the negative charge on the metal sphere after touching the negatively charged rubber rod is:

• It will spread uniformly over the surface of the sphere, because of the conducting nature of the sphere and similar charges push away from each other.

This is because metal is a conductor, and when the negatively charged rod touches the neutral metal sphere, the excess negative charges will redistribute uniformly over the surface of the sphere due to repulsion between like charges.

A teacher places a metal can on top of an insulating foam cup and touches the side of the cup with a negatively charged rod. The setup is shown in the picture below.
CAN
What will happen to the negatively charged electrons when the rod touches the foam cup?
(1 point)
O The electrons will transfer from the cup to the metal can, causing both cup and can to have a positive charge.
The electrons will transfer to the cup and will remain in a concentrated, positively charged area on the cup where the rod was placed.
• The electrons will transfer to the cup and will remain in a concentrated, negatively charged area on the cup where the rod was placed.
The electrons will transfer from the cup to the metal can, causing both the cup and can to
have a negative charge.

When the negatively charged rod touches the insulating foam cup, the following will happen:

The electrons will transfer to the cup and will remain in a concentrated, negatively charged area on the cup where the rod was placed.

Since the rod is negatively charged, it will transfer some of its excess electrons to the foam cup, making that area of the cup negatively charged while the rest of the cup stays neutral. The distribution of the charge on the insulating cup will be uneven, with the area where the rod touches acquiring more negative charge.

Jack touches a negatively charged plastic rod to a metal sphere. How will the negative charges spread throughout the sphere? (1 point)
• They spread out evenly.
• They stay on the top.
• They spread out unevenly.
• They stay on the bottom.

When Jack touches a negatively charged plastic rod to a metal sphere, the negative charges will:

• They spread out evenly.

In a conductive material like a metal sphere, charges will redistribute due to the repulsion between like charges. This results in the negative charges spreading evenly across the surface of the sphere to minimize repulsion and achieve electrostatic equilibrium.

There are different methods to electrically charge an object. Which method involves charging a conductor by bringing it near another charged object without the objects touching. (1 point)
• friction
• conduction
• neutralization
• Induction

The method of charging a conductor by bringing it near another charged object without the objects touching is called:

• Induction

In induction, the presence of a charged object induces a separation of charges in the neutral conductor, leading to the conductor becoming charged without direct contact.