Answers FL-2002040-MJ Comprehensive Science 1 CRThe Musculoskeletal and Integumentary Systems

Electric Charge Answers

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Why does Chelsea see sparks as she removes her clothes from the clothes dryer?

conduction

induction

static discharge

loss of protons

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Which factors affect the strength of the electric force between two objects?

the mass of the objects and the distance between the objects

the amount of charge on the objects and the type of charge on the objects

the distance between the objects and the amount of charge on the objects

the mass of the objects and the amount of charge on the objects

A plastic rod becomes negatively charged when it is rubbed with a piece of wool. How does the rod become charged?

Electrons move from the rod to the wool.

Protons move from the rod to the wool.

Electrons move from the wool to the rod.

Protons move from the wool to the rod.

Two balls are placed near one another and hang down, as shown below.

Neither ball has a charge.

The balls are both positively charged.

One ball is positively charged, and the other is negatively charged.

Each ball has a charge, but the type of charge is unknown.

Shareen performs a skit to model a method of charging. In the skit, a painter shakes her hand and gets paint on her.

It models induction because the painter represents a neutral object and the paint represents electrons that are transferred through rubbing.

It models conduction because the painter represents a charged object and the paint represents electrons that are transferred through contact.

It models induction because the painter represents a charged object and the paint represents electrons that are transferred through contact.

It models conduction because the painter represents a neutral object and the paint represents electrons that are transferred through rubbing.

A negatively charged rod is placed near two neutral metal spheres, as shown below.

The spheres are charged through friction.

The spheres develop the same charge.

Electrons move from the rod to Sphere A.

Electrons move from Sphere A to Sphere B.

The diagram shows two charged objects, X and Y.

X: positiveY: negative

X: negativeY: neutral

X: positiveY: positive

An electroscope is a device that detects charge on objects that touch it or are brought near it. John rubs a piece of cotton fabric on a plastic rod and then touches the rod to the electroscope.

John charges the rod through induction, then charges the electroscope through friction.

John charges the rod through conduction, then charges the electroscope through induction.

John charges the rod through friction, then charges the electroscope through induction.

John charges the rod through friction, then charges the electroscope through conduction.

Hiro rubs an inflated balloon on his hair, and his hair sticks to the balloon. As he moves the balloon away from his head, how does the electric force change?

The electric force increases because the balloon loses its charge.

The electric force increases because the distance increases.

The electric force decreases because the distance increases.

The electric force decreases because his hair loses its charge.

Which change increases the electric force between objects?

Two neutral objects are moved closer together.

Electrons are added to two negatively charged objects.

Two oppositely charged objects are moved farther apart.

The charge on two positively charged objects is reduced.

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